WBBSE For Class 9 Life Science Chapter 4 Biology And Human Welfare MCQS

Chapter 4 Biology And Human Welfare MCQs

Question 1. Which one of the following help in increase the yield of rice-T
(1) Pseudomonas
(2) Azotobactor
(3) Spirulina
(4) Azolla

Answer: (4) Azolla.

Question 2. Which one is a symbiotic bacteria ?
(1) Clostridium
(2) Chlorobium
(3) Chromatium
(4) Rhizobium

Answer: (4) Rhizobium

Question 3. The algae spirulina is-
(1) Biofertiliser
(2) Single cell protein
(3) Antibiotic
(4) Biopesticide

Answer: (3) Antibiotic.

Question 4. Microbes are very useful in the production of-
(1) Vaccine
(2) Antibiotic
(3) Fuel
(4) All the above

Answer: (4) All the above.

Question 5. Which one of the following is not a biofertilizer?
(1) Agrobacterium
(2) Rhizobium
(3) Nostoc
(4) Mycorrh

Answer: (3) Nostoc.

Question 6. The pathogen of malaria is-
(1) Bacteria
(2) Virus
(3) Protozoa
(4) Nematodes

Answer: (3) Protozoa.

Question 7. BCG is a vaccine used for the disease-
(1) Malaria
(2) Tuberculosis
(3) Pneumonia
(4) Cholera

Answer: (2) Tuberculosis.

Question 8. WASH programme was launched by –
(1) UNESCO
(2) Russia
(3) IUCN
(4) UNICEF

Answer: (4) UNICEF.

Question 9. WBC cell associated with immunity is-
(1) Neutrophil
(2) Eosinophil
(3) Basophil
(4) Monocyte

Answer: (1) Neutrophil.

Question 10. Antibodies are-
(1) Carbohydrate
(2) Protein
(3) Lipid
(4) Vitamins

Answer: (2) Protein.

Question 11. The process of developing immunity against infection is called-
(1) Immunization
(2) Vaccination
(3) Sanitation
(4) Toxication

Answer: (1) Immunization.

Question 12. A sexually transmitted disease is –
(1) Malaria
(2) Dengue
(3) AIDS
(4) Filaria

Answer: (3) AIDS.

Question 13. This germ causes serious diarrhoea in human. It is –
(1) Salmonella
(2) Mycobacterium
(3) Agaricus
(4) Corynebacterium

Answer: (1) Salmonella

Question 14. This virus infects through blood transfusion. This is –
(1) Hepatitis A virus
(2) Hepatitis B virus
(3) Influenza virus
(4) None

Answer: (2) Hepatitis B virus

Question 15. Flavivirus causes-
(a) Hepatitis
(b) AIDS
(c) Dengue
(d) Influenza

Answer: (3) Dengue

Question 16. Cause of tuberculosis is a-
(1) Virus
(2) Protozoa
(3) Bacteria
(4) Fungi

Answer: (3) Bacteria

Question 17. Retroviruses cause a disease. This is known as –
(1) Autoimmune disease
(2) Immune deficiency disease
(3) Hepatitis B
(4) Hepatitis A

Answer: (2) Immune deficiency disease

Question 18. Mycorrhiza is an association of-
(1 Bacteria and virus
(2) Algae and fungi
(3) Fungi and root of plants
(4) Fungi and gymnosperms

Answer: (3) Fungi and root of plants

Question 19. Which of the following is not a type of immunoglobulin?
(1) IgG
(2) IgE
(3) IgA
(4) IgS

Answer: (4) IgS

Question 20. The foreign substances which on entering our body activate the body’s immune system are-
(1) Antibodies
(2) Antigens
(3) Immunoglobulins
(4) Lymphocytes

Answer: (2) Antigens

Question 21. Which of the following vaccines contain killed pathogens?
(1) Killed vaccine
(2) Toxoid vaccine
(3) Attenuated vaccine
(4) Conjugate vaccine

Answer: (1) Killed vaccine

Question 22. Which of the following is not a type of T-cell?
(1) Cytotoxic T-cell (T, cell)
(2) Helper T-cell (T,, cell)
(3) Suppresor T-cell (T, cell)
(4) Plasma T-cell (T, cell).

Answer: (4) Plasma T-cell (T, cell)

Question 23. Which of the following is a fungus acting as bio-control agent?
(1) Bacillus thuringiensis
(2) Caudovirales
(3) Nosema locustae
(4) Beauveria bassiana

Answer: (4) Beauveria bassiana

Question 24. Tetanus is caused by-
(1) Bacteria
(2) Virus
(3) Protozoa
(4) Fungi

Answer: (1) Bacteria

Question 25. Causative agent of diphtheria is –
(1) Clostridium tetani
(2) Streptococcus pneumoniae
(3) Mycobacterium tuberculosis
(4) Cornybacterium diphtheriae

Answer: (4) Cornybacterium diphtheriae

Question 26. Yellowing of skin and eye is a symptom of –
(1) Pneumonia
(2) Tetanus
(3) Hepatitis
(4) AIDS

Answer: (3) Hepatitis

Question 27. Dengue is caused by-
(1) Plasmodium vivax
(2) Plasmodium malariae
(3) Flavivirus
(4) Plasmodium falciparum

Answer: (3) Flavivirus

Question 28. Which of the following is an anaerobic nitrogen fixing bacteria, actin as biofertilizer?
(1) Azotobacter
(2) Clostridium
(3) Derxia
(4) Rhizobium

Answer: (1) Azotobacter

Question 29. Fungi involved in formation of mycorrhiza is-
(1) Agaricus
(2) Amanita
(3) Saccharomyces
(4) Ascobolus

Answer: (2) Amanita

 

WBBSE For Class 9 Life Science Chapter 1 Life And Its Diversity MCQS

Chapter 1 Life And Its Diversity Life And Its Diversity Plant Kingdom MCQs

Question 1. Bryophytes are — :
(1) Embryophytes
(2) Pioneer land plants
(3) All of these
(4) Amphibians of plant kingdom

Answer: (4)Amphibians of plant kingdom.

Question 2. Which group of plant is known as vascular cryptogams?
(1) Bryophyta
(2) Pteridophyta
(3) Gymnosperm
(4) Algae

Answer: (2)Pteridophyta. :

Question 3. kelps are marine —
(1) Angiosperm
(2) Red algae
(3) Green algae
(4) Brown algae

Answer: (4)Brown alga.

Question 4. Multicellular rhizoids occur in —
(1) Liver worts
(2) Hornworts
(3) Mosses
(4) None of these

Answer: (3)Mosses.

Question 5. Spirulina belongs to kingdom —
(1) Monera
(2) Fungi
(3) Plantae
(4) Animalia

Answer: (1)Monera.

Question 6. An alga which is rich in protein is —
(1) Ulothrix
(2) Spirogyra
(3) Nostoc
(4) Chlorella

Answer: (4)Chlorella.

Question 7. Which one of the following plant is monocious?
(1) Marchantia
(2) Pinus
(3) Cycas
(4) Papaya

Answer: (2)Pinus.

Question 8. Which one is an edible fungi?
(1) Mucor
(2) Penicillium
(3) Rhizopus
(4) Agaricus

Answer: (4)Agaricus.

Question 9. Component of the cell wall of fungi is —
(1) Cellulose
(2) Pectin
(3) Chitin
(4) Dextrin

Answer: (3)Chitin.

Question 10. A plant with naked seed is —
(1) Mango
(2) Cycas
(3) Fern
(4) Neem

Answer: (2)Cycas.

Question 11. Which of the following is a prokaryote?
(1) Amoeba
(2) Spirogyra
(3) Bacteria
(4) Chlamydomonas

Answer: (3)Bacteria.

Question 12. The lichen represents symbiotic relationship between —
(1) Algae and bacteria —_
(2) Fungi and higher plants
(3) Algae and fungi
(4) Bacteria and virus :

Answer: (3)Algae and fungi.

Question 13. A thalloid bryophyte is —
(1) Riccia
(2) Pogonatum
(3) Dryopteris
(4) Lycopodium

Answer: (1)Riccia.

Question 14. Angiosperms are included under —
(1) Embryophyta
(2) Trachaeophyta
(3) Spermatophyta
(4) Each of them

Answer: (4)Each of them.

Question 15. In fungi reserve food is —
(1) Starch
(2) Cellulose
(3) Glycogen
(4) Ali of these

Answer: (3)Glycogen.

Question 16. Fern rhizome is —
(1) Root
(2) Stem
(3) Rhizoid
(4) Rhizophore

Answer: (3)Rhizoid.

Question 17. The smallest flower is of —
(1) Carica papaya
(2).Nelumbo nucifera
(3) Wolfia micro scopia_
(4) Rafflesia

Answer: (3)Wolfia micro scopia.

Question 18. Which part of coconut is eaten?
(1) Entire seed
(2) Embryo
(3) Pericarp
(4) Seed coat

Answer: (1)Entire seed.

Question 19. Which one is a parasitic algae ?
(1) Sargassum
(2) Ulothrix
(3) Cephaleuros
(4) Oedogonium

Answer: (3)Cephaleuros. :

Question 20. Which one is not a root vegetable?
(1) Potato
(2) Turnip
(3) Carrot
(4) Sweet potato

Answer: (1)Potato.

Chapter 1 Life And Its Diversity Animal Kingdom MCQs

Question 1. Which of the following is ectoparasite in other fishes —
(1) Dog fish
(2) Lamprey
(3) Rohu
(4) Lobeo

Answer: (2)Lamprey. :

Question 2. Which of the following is toad?
(1) Hyla
(2) Bufo
(3) Rana
(4) Tree frog

Answer: (2)Bufo.

Question 3. Which of the following is a flying lizard?
(1) Wall lizard
(2) Varanus
(3) Draco
(4) Monitor lizard

Answer: (3)Draco.

Question 4. “Venus flower basket” is the popular name of —
(1) Spongilla
(2) Sea lily
(3) Euplectella
(4) Obelia

Answer: (3)Euplectella.

Question 5. Leach is —
(1) Endoparasite
(2) Ectoparasite
(3) Vector
(4) Free living

Answer: (2)Ectoparasite.

Question 6. The anti-coagulant produced by Leech is —
(1) heparin
(2) hirudin
(3) oxalates
(4) citrates

Answer: (2)hirudin.

Question 7. Acharacteristic feature of mollusc is —
(1) Soft body
(2) Shell
(3) Foot
(4) Mantle

Answer: (4)Mantle.

Question 8. The centipedes have —
(1) 100 legs
(2) 100-200 legs
(3) A pair of legs per each trunk segment
(4) Equal to the body segment

Answer: (3)A pair of legs per each trunk segment.

Question 9. Water vascular system is a characteristic of —
(1) Sponges
(2) motluses
(3) Coelentrates
(4) Echinoderm

Answer: (4)Echinoderm.

Question 10. The internal body cavity of coelenterates is —
(1) Haemocoel
(2) Coelom
(3) Enteron
(4) Pseudocoel

Answer: (3)Enteron.

Question 11. Which one Arthopodes is viviparous ?
(1) Cockroach
(2) Scorpion
(3) Prawn
(4) Centipede

Answer: (2)Scorpion.

Question 12. Which of the following is not a true fish?
(1) Dogfish
(2) Jelly fish
(3) Flying fish
(4) Gold fish

Answer: (2)Jelly fish.

Question 13. All are cold blooded animals except

(1) crocodile
(2) varanus
(3) snake
(4) pigeon

Answer: (4)pigeon.

Question 14. The bat is a true —
(1) bird
(2) flying mammal
(3) flying fish
(4) flying lizard

Answer: (2)flying mammal.

Question 15. The scorpion respires through —
(1) Gills
(2) Spiracles
(3) Book lung
(4) Trachea

Answer: (3)Book lung.

Question 16. The basic unit of classification is —
(1) order
(2) class
(3) species
(4) family

Answer: (3)species.

Question 17. Animals having innumerable pores in their body are grouped under—
(1) Porifera
(2) Coelenterata
(3) Protozoa
(4) Mollusca

Answer: (1)Porifera.

Question 18. Acoelomate animals fall under the phylum —
(1) Nemathelminthes _
(2) Platyhelminthes
(3) Annelida
(4) Arthropoda

Answer: (2)Platy helminthes.

Question 19. One of the following animals get already digested food and need not digest it again. It is —
(1) Amoeba
(2) Cockroach
(3) Leech
(4) Taenia

Answer: (4)Taenia.

Question 20. The Largest number of animals belong to —
(1) Mammalia
(2) Arthropoda
(3) Reptilia
(4) Pisces

Answer: (2)Arthropoda.

Question 21. The body of hydra is —
(1) Monoblastic
(2) Triploblastic
(3) Diplobiastic
(4) Polyblastic

Answer: (3)Diploblastic.

Question 22. Ink gland is found in—
(1) Sepia
(2) Octopus
(3) Loligo
(4) All of these

Answer: (4)All of these.

Question 23. True flight is found in —
(1) Flying fish
(2) Flying lizard
(3) Flying frog
(4) Bat

Answer: (4)Bat.

Question 24. Mammary glands are modification of —
(1) Salivary galnd
(2) Sebaceous.gland
(3) Sweat gland
(4) Lacrymal gland

Answer: (2)Sebaceous gland.

Question 25. The phylum of which animals can live on land, in water and can also fly is— 
(1) Arthropoda
(2) Protozoa
(3) Mollusca
(4) Annelida

Answer: (1)Arthropoda.

Question 26. Which one of we following animals is not a vertebrate?
(1) Fish *
(2) Pigeon
(3) Garden lizard
(4) Amphioxus

Answer: (4)Amphioxus.

Question 27. Stinging cells are found in —
(1) Frog
(2) Snake
(3) Hydra
(4) Snail

Answer: (3)Hydra. :

Question 28. The bat differs from bird in having —
(1) Four chambered heart
(2) Diaphragm
(3) Wings
(4) Small brain

Answer: (2)Diaphragm.

Question 29. The animals of which invertebrate phylum consist kidney like structure for excretion?
(1) Anrthropoda
(2) Mollusca
(3) Porifera
(4) Echinodermata

Answer: (2)Mollusca.

Question 30. Excretory organ of earthworm is —
(1) Nephirdia
(2) Kidney
(3) Trachea
(4) Gills

Answer: (1)Nephirdia.

Chapter 1 Life And Its Diversity Life and Biology MCQs

Question 1.Who first recognised plants and animals as living objects ?
(1) Linnaeus
(2) Aristotle
(3) Pavlov
(4) Phillipson

Answer: (2)Aristotle

Question 2. In which of the following leaves protoplasmic movement is clearly observed under microscope —
(1) Vallisneria leaf
(2) China rose leaf
(3) Lotus leaf
(4) Lemna leaf

Answer: (1)Vallisneria leaf

Question 3. The constructive phase in which food materials are built up into more complex substances is called —
(1) Catabolism
(2) Metabolism
(3) Anabolism
(4) None of these

Answer: (3)Anabolism :

Question 4. Movement by the help of flagella is observed in —
(1) Paramaecium
(2) Euglena
(3) Amoeba
(4) Hydra

Answer: (2)Euglena

Question 5. The characteristic of life is —
(1) Respiration
(2) Movement
(3) Growth
(4) All of these

Answer: (4)All of these

Question 6. Life first originated in earth —
(1) In the soil
(2) In air
(3) In rocks
(4) In water

Answer: (4)In water

Question 7. The study of classification of plants and animals on the basis of their relationship, resemblances and differences is called —
(1) Ecology
(2) Taxonomy
(3) Anatomy
(4) Genetics

Answer: (2)Taxonomy

Question 8. The term ecology was proposed by —
(1) Haeckel
(2) Pavlov
(3) Simpson
(4) Tansiey

Answer: (1)Haeckel

Question 9. Biology and Statistics together form a subject called —
(1) Bionics
(2) Biometry
(3) Bioinformatics
(3) Bio-Geography

Answer: (2)Biometry

Question 10. The subject which deals with the study of cells is called —
(1) Genetic .
(2) Cytology
(3) Taxonomy :
(4) Pathology

Answer: (2)Cytology

Question 11. The branch of science which deals with birds is called —
(1) Apiculture
(2) Pisciculture
(3) Ornithology
(4) None of these

Answer: (3)Ornithology

Question 12. The branch of science which deals with the study of bacteria is called —
(1) Dendrology
(2) Agrostology
(3) Bacteriology
(4) Helminthology

Answer: (3)Bacteriology

 

WBBSE For Class 9 Life Science Chapter 3 Physiological Processes Of Life MCQS

Chapter 3 Physiological Processes Of Life Respiration MCQs

Question 1. Who proposed that respiration is a catabolic process?
(1) Lamark
(2) Lavoisier
(3) Pristley
(4) Barnes

Answer: (2) Lavoisier.

Question 2. Energy currency of cell is—
(1) ADP
(2) Mitochondria
(3) ATP
(4) Chloroplast

Answer: (3) ATP.

Question 3. Arespiratory substrate is —
(1) glucose
(2) Protein
(3) fats
(4) All of these

Answer: (4) All of these.

Question 4. The starting point of respiration is —
(1) Amino acid
(2) Glucose
(3) Pyruvate
(4) None

Answer: (2) Glucose.

Question 5. The site of glycolysis is —
(1) Mitochondria
(2) Cytoplasm
(3) Golgibodies
(4) Nucleus

Answer: (2) Cytoplasm.

Question 6. The final phase of respiration is —
(1) glycolysis
(2) terminal respiration
(3) krebs cycle
(4) cytoplasm.

Answer: (2) terminal respiration.

Question 7. The step common in both aerobic and anaerobic respirations is —
(1) Krebs cycle
(2) Terminal respiration
(3) Glycolysis
(4) Carbon assimilalion

Answer: (3) Glycolysis.

Question 8. In fermentation pyruvic acid is converted into (in animals) —
(1) lactic acid
(2) ethanol
(3) starch
(4) glycogen

Answer: (1) lactic acid.

Question 9. In krebs cycle the first formed acid is —
(1) acetic acid
(2) farmic acid
(3) citric acid
(4) carbonic acid

Answer: (3) citricacid.

Question 10. T.C.A. cycle is also called —
(1) glycolysis
(2) krebs cycle
(3) light phase
(4) dark phase

Answer: (2) krebs cycle.

Question 11. Energy produced in aerobic respiration is —
(1) 646 kcal
(2) 686 kcal
(3) 656 kcal
(4) 486 kcal

Answer: (2) 686 kcal.

Question 12. Number of ATP produced during glycolysis is —
(1) 4 molecules
(2) 6 molecules
(3) 1 molecules
(4) 2 molecules

Answer: (4) 2 molecules.

Question 13. A bacteria having anaerobic respiration is —
(1) Clostridium
(2) Rhizobiun
(3) Azotobactor
(4) All

Answer: (4) All.

Question 14. Pneumatophores are found in —
(1) halophytes
(2) bryophytes
(3) epiphytes
(4) algael

Answer: (a) hallophytes.

Question 15. The respiratory organ in dragonfly is —
(1) gills
(2) external gills
(3) tracheal gills
(4) moist skin

Answer: (3) tracheal gills.

Question 16. Example of jeol fish is —
(1) Koi
(2) Mangur
(3) Singhi
(4) All of these

Answer: (4) All of these.

Question 17. An aquatic mammal respiring with lungs is —
(1 Sea horse
(2) Whale
(3) Shark
(4) Dolphin

Answer: (2) Whale.

Question 18. The respiratory organ of crocodile is —
(1) Gill
(2) Skin
(3) Lung
(4) Trachea

Answer: (3) Lung.

Question 19. Pyruvic acid is the end product of —
(1) Calvin cycle
(2) Citric acid cycle
(3) Glycolysis
(4) Photolysis

Answer: (3) Glycolysis.

Question 20. Cell organelle which participates in respiration is —
(1) Goligbodies
(2) Mitochondria
(3) Chloroplast
(4) Nucleus

Answer: (2) Mitochondria.

Question 21. Percentage of CO, in air is —
(1) 0.05%
(2) 0.06%
(3) 0.03%
(4) 0.09%

Answer: (3) 0.03%.

Question 22. RQ of glucose is —
(1) 2
(2) Less than one
(3) 1
(4) 3

Answer: (3) 1.

Question 23. Covering membrane of lung is —
(1) Pericardium
(2) Pleura
(3) Meninges
(4) Tonoplast

Answer: (2) Pleura.

Question 24. Spiracels are present in —
(1) Earthworm
(2) Cockroach
(3) Fishes
(4) Amoeba

Answer: (2) Cockroach.

Question 25. In plant exchange of gases takes place through —
(1) Stomata
(2) Lenticel
(3) Chloroplast
(4) Both a and b

Answer: (4) Both a and b.

Question 26. An animal having respiration with mouthcavity and lungs is —
(1) Fish
(2) Crocodile
(3) Frog
(4) Eathworm

Answer: (3) Frog.

Question 27. In higher plants exchange of gases takes place through —
(1) Stomata
(2) Lenticels
(3) Pneumatophore
(4)All

Answer: (4) All.

Question 28. Which respiratory pigment is present is pond snail ?
(1) Haemoglobin
(2) Haemocyanin
(3) Heparin
(4) Fibrin

Answer: (2) Haemocyanin.

Question 29. Alveoli are present in —
(1) heart
(2) brain
(3) lungs
(4) stomach

Answer: (3) lungs.

Question 30. Lactic acid are found in our body in—
(1) Lungs
(2) Skeletal muscle
(3) Cardiac muscle
(4) Smooth muscle.

Answer: (2) Skeletal muscle.

Question 31. Which one of the following organs is the main respiratory organ of whale ?
(1) Integument
(2) Lung
(3)Gill
(4) Trachea.

Answer: Lung is the main respiratory organ of whale.

Question 32. The cell organelle which participates in respiration is —
(1) Golgibodies
(2) Mitochondria
(3) Nucleus
(4) chloroplast

Answer: The cell organelle which participates in respiration is Mitochondria.

Question 33. What is the main respiratory organ of house lizard ?
(1) Integument
(2) Nephridia
(3) External gills s
(4) Lungs

Answer: Lung is the main respiratory organ of house lizard.

Question 34. Pyruvic acid is the end product of —
(1) Citric acid cycle
(2) Calvin cycle
(3) Glycolysis
(4) Photolysis

Answer: Pyruvic acid is the end product of Glycolysis.

Question 35. Respiratory organ of a cockroach is —
(1) Skin
(2) Gill
(3) Trachea
(4) Lung.

Answer: Respiratory organ of a cockroach is Trachea.

Question 36. In which of the animals, trachea is the respiratory organ?
(1) Cockroach
(2) Fish
(3) House lizard
(4) Earth worm.

Answer: Trachea is the respiratory organ of Cockroach.

Question 37. The respiratory organ of Crocodile is —
(1) Gill
(2) Skin
(3) Lung
(4) Trachea

Answer: The respiratory organ of Crocodile is Lung.

Question 38. Respiration in absence of free oxygen is —
(1) Anaerobic
(2) Aerobic
(3) Alcoholic fermentation

Answer: Respiration in absence of free oxygen is Anaerobic.

Question 39. An animal performing anaerobic respiration is —
(1) Earth worm
(2) Tapeworm
(3) Glow worm
(4) None of the above

Answer: An animal performing anaerobic respiration is Tapeworm.

Question 40. Percentage of oxygen in inspiratory air is —
(1) 16%
(2) 12.4%
(3) 20.60%
(4) 30%

Answer: Percentage of oxygen in inspiratory air is 20.60%

Question 41. What is the end product of Glycolysis?
(1) Citric acid
(2) Malic acid
(3) Nitric acid
(4) Pyruvic acid

Answer: Pyruvic acid is the end product of Glycolysis.

Question 42. In the cell of living organisms the energy is stored in
(1) NADP
(2) ADP
(3) ATP
(4) PGA

Ans In the cell of living organisms the energy is stored in ATP.

Question 43. In which animal does skin act as the main respiratory organ?
(1) Toad
(2) Prawn
(3) Cockroach
(4) Earthworm

Answer: Skin acts as the main respiratory organ in Earthworm.

Question 44. The breathing organ of Rohu fish is —
(1) Green gland
(2) Trachea
(3)Gill
(4) Lung

Answer: The breathing organ of Rohu fish is Gill.

Question 45. In which of the organs alveolus is seen ?
(1) Liver
(2) Lung
(3) Skin
(4) Kidney

Answer: Alveolus is seen in Lung.

Question 46. Which one of the following is produced in muscle cells during anaerobic respiration?
(1 Acetic acid
(2) Lactic acid
(3) Ethyl alcohol
(d4) Hydrochloric acid

Answer: Lactic acid is produced in muscle cells during anaerobic respiration.

Question 47. Which one of the following is called energy currency ?
(1) NADH2
(2) ATP
(3) ADP
(4) FADH2

Answer: ATP is called energy currency.

Question 48. Cutaneous respiration takes place in
(1) Cockroach
(2) Earthworm
(3) Spider
(4) Amoeba.

Answer: Cutaneous respiration takes place in Earthworm.

Question 49. Respiratory organ of Periplanta americana is
(1) Skin
(2) External gills
(3) Lung
(4) Trachea

Answer: Respiratory organ of Periplanta americana is trachea.

Question 50. The respiratory organ of shark is
(1) Lungs
(2) Trachea
(3) Internal gills
(4) External gills

Answer: The respiratory organ of Shark is internal gills.

Question 51. How many ATP are produced from 1 gm mole glucose by aerobic
respiration ?
(1) 8 ATP
(2) 38 ATP
(3) 12 ATP
(4) 7 ATP

Answer: 38 ATP are produced from 1gm mole glucose by aerobic respiration.

Question 52. Glycolysis occurs within the
(1) Cytoplasm
(2) Mitochondria
(3) Plastids
(4) Nucleus

Answer: Glycolysis occurs within the cytoplasm.

Question 53. Due to oxidation of how much glucose about 686 K cal of energy is generated in aerobic respiration.
(1) 1 Molecule of glucose
(2) 1 gm molecule of glucose
(3) 1. gm of glucose
(4) 180 kg of glucose

Answer: Due to oxidation of 1 molecule of glucose about 686 K cal of energy is generated in aerobic respiration.

Question 54. The biochemical pathway which produces pyruvic acid as an end product is —
(1) Photolysis
(2) Glycolysis
(3) Kreb’s cycle

Answer: The biochemical pathway which produces pyruvic acid as an end product is glycolysis.

Question 55. Lactobacillus is used for making
(1) Acetic acid
(2) Alcohol
(3) lactic acid from Lactose of milk.

Answer: Lactobacillus.is used for making lactic acid from lactose of milk.

Question 56. Labyrinthine organ is an accessory respiratory organ of
(1) Scorpion
(2) Koi
(3) Crocodile
(4) Frog

Answer: Labyrinthine organ is ari accessory respiratory organ of Koi.

Question 57. In which form of energy is the potential energy of the food usually liberated in respiration ?
(1 light energy
(2) heat and kinetic energy
(3) electric energy
(4) kinetic energy

Answer: The potential energy of food is usually liberated in the form of heat energy and kinetic energy in respiration.

Question 58. What is the respiratory organ of cockroach ?
(1) Cell Membrane
(2) Moist skin
(3) Trachea
(4) Gills

Answer: Trachea is the respiratory organ of cockroach.

Question 59. In anaerobic respiration___ Keal energy is produced.
(1) 150
(2) 686
(3) 574
(4) 50

Answer: In anaerobic respiration 50 Kcal energy is produced.

Chapter 3 Physiological Processes Of Life Nutrition MCQs

Question 1. The secretion of which of the following glands does not contain any enzyme necessary for digestion ?
(1) Liver
(2) Pancreas
(3) Salivary gland
(4) Glands of the small intestine

Answer: The secretion of Liver does not contain any enzyme necessary for digestion.

Question 2. Amongst the following types of food, which one has Nitrogen as an essential component ?
(1) Fats
(2) Carbohydrates
(3) Proteins

Answer: Protein has Nitrogen as an essential component

Question 3. An example of Symbiotic plant is —
(1) Cuscuta
(2) Agaricus
(3) Sundew
(4) Lichen

Answer: An example of Symbiotic plant is Lichen.

Question 4. From which part of human digestive system no carbohydrate digesting enzyme is secreted ?
(1) Buccal cavity
(2) Pancreas
(3) Intestine
(4) Stomach

Answer: From Stomach no carbohydrate digesting enzyme is secreted.

Question 5. Cuscuta is a –
(1) Autotroph
(2) Heterotroph
(3) Parasite

Answer: Cuscuta is a Parasite.

Question 6. The Vitamin that can be synthesized in human body is —
(1) K
(2) C
(3) A
(4) D

Answer: The Vitamin that can be synthesized in human body is D.

Question 7. Which of the following acts as source of energy in the body?
(1) Carbohydrate
(2) Vitamin
(3) Water
(4) Minerals

Answer: Carbohydrate acts as source of energy in the body.

Question 8. Which type of food provides nitrogen to the body?
(1) Carbohydrate
(2) Protein
(3) Fat
(4) Vitamin

Answer: Protein type of food provides nitrogen to the body.

Question 9. Which one of the following is the largest digestive gland in vertebrates?
(1) Salivary glands
(2) Pancreas
(3) Liver
(4) Intestinal gland

Answer: Liver is the largest digestive gland in vertebrates.

Question 10. The proteolytic enzyme in pancreatic juice is —
(1) Amylase
(2) Lipase
(3) Trypsin
(4) Pepsin

Answer: The proteolytic enzyme in pancreatic juice is Trypsin.

Question 11. Chemical name of Vitamin C is —
(1) Ascorbic acid
(2) Retinol
(3) Phylloquinone
(4) Nicotinic acid

Answer: Chemical name of Vitamin C is Ascorbic acid.

Question 12. Which of the following parts of human digestive system does not secrete protein and oil or fat digestive enzyme?
(1) Mouth
(2) Pancreas
(3) Small intestine
(4) Stomach

Answer: Mouth does not secrete protein and oil or fat digestive enzyme.

Question 13. Due to deficiency of which of the following demente chlorosis occurs in plants ?
(1) Calcium
(2) Oxygen
(3) Magnesium
(4) Sodium

Ans Due to deficiency Magnesium chlorosis occurs in plants.

Question 14. In which of the following parts of the digestive system of human body digested food substances are absorbed ?
(1 Oesophagus
(2) Liver
(3) Pancreas
(4) Small intestine

Ans Digested food substances are absorbed in Small intestine.

Question 15. Which of the following organs produces bile ?
(1) Gall bladder
(2) Pancreas
(3) Liver

Ans Liver produces bile.

Question 16. The name of the enzyme which is present in the saliva and which acts upon carbohydrate food is —
(1) Pepsin
(2) Ptyalin
(3) Amylase
(4) Erepsin

Answer: The name of the enzyme which is present in the saliva and which acts upon carbohydrate food is Ptyalin.

Question 17. The bile duct enters —
(1 Liver
(2) Pancreas
(3) Duodenum

Answer: The bile duct enters Duodenum.

Question 18. Deficiency of which vitamin produces anaemia?
(1) Vitamin B1
(2) Vitamin B12
(3) Vitamin B6
(4) Vitamin B2

Answer: Deficiency of Vitamin B12 produces anaemia.

Question 19. Which vitamin contains cobalt ?
(1) Vit B1
(2) Vit B2
(3) Vit B12
(4) Vit C

Answer: Vit B12contains cobalt.

Question 20. Which of the following diseases results due to deficiency of Vitamin ‘A’ ?
(1) Ricket
(2) Scurvy
(3) Night blindness
(4) Beri-Beri

Answer: Night blindness disease results due to deficiency of Vitamin ‘A’.

Question 21. Where are villi situated ?
(1) In kidney
(2) In lungs
(3) Buccal cavity
(4) Small intestine

Answer: Villi are situated in Small intestine.

Question 22. What is pepsin?
(1) Animal hormone
(2) Enzyme
(3) Plant hormone
(4) panes material

Answer: Pepsin is Enzyme.

Question 23. Which one of the following vitamins is water soluble?
(1) Vitamin A
(2) Vitamin C
(3) Vitamin D
(4) Vitamin E

Answer: Vitamin C is water soluble.

Question 24. Which one of the following elements is required as trace element in plant ?
(1 Carbon
(2) Nitrogen
(3) Boron
(4) Phosphorus

Answer: Boron is required as trace element in plant.

Question 25. Which one of the following is hindered due to deficiency of vitamin ‘A’ causing “night blindness” ?
(1) Rod cell construction
(2) Retina constfuction
(3) Cone cell construction
(4) Nerve cell construction

Answer: Rod cell construction is hindered due to deficiency of vitamin ‘A’ causing “night blindness”.

Question 26. The Vitamin sysnthesized in the human skin is —
(1) Vitamin K
(2) Vitamin C
(3) Vitamin A
(4) Vitamin D

Answer: The Vitamin synthesized in human skin is Vitamin D.

Question 27. An animal Starch is —
(1) Glycogen
(2) Albumin
(3) Sucrose
(4) Maltose

Answer: An animal Starch is Glycogen.

Question 28. Blood coagulation does not occur due to the deficiency of which Vitamin ?
(1) Vitamin A,
(2) Vitamin B12,
(3) Vitamin C,
(4) Vitamin K

Answer: Blood coagulatior does not occur due to the deficiency of Vitamin K.

Question 29. Mainly from which molecule of the following, energy is released ?
(1) Protein
(2) Glycerol
(3) Glucose
(4) Amino acid

Answer: Energy is released mainly from glucose molecule.

Question 30. A micro element helpful in plant nutrition is .
(1) Nitrogen
(2) Potassium
(3) Zine
(4) Phosphorus

Answer: A micro element helpful in Plant nutrition is Zinc.

Question 31. Due to the deficiency of which Vitamin the disease Ricket occurs in children ?
(1) Vitamin A
(2) Vitamin C
(3) Vitamin D
(4) Vitamin K

Answer: Due to the deficiency of Vitamin D the disease Ricket occurs in children.

Question 32. The component of food which does not yield energy is
(1) Carbohydrate
(2) Protein
(3) Fat
(4) Vitamin.

Answer: The component of food which does not yield energy is Vitamin.

Question 33. Pellagra is caused due to the deficiency of 3
(1) Amino acid
(2) Nicotinic aicd
(3) Citric acid
(4) Lactic acid

Answer: Pellagra is caused by due to deficiency of Nicotinic acid.

Question 34. The gland from which. three types of digestive enzymes are secreted is —
(1) Liver
(2) Pancreas
(3) Salivary gland
(4) Gastiric gland

Answer: The gland from which three types of digestive enzymes are
secreted is pancreas.

Question 35. Deficiency of which Vitamin causes Scurvy ?
(1) Vitamin A
(2) Vitamin D
(3) Vitamin E
(4) Vitamin C

Answer: Deficiency of Vitamin C causes scurvy.

Question 36. Which mineral is present in haemocyanin pigment ?
(1)Fe
(2) Mg
(3) Cu
(4) Co

Answer: Cu mineral is present in haemocyanin pigment.

Question 37. Which animal from the following organisms can prepare its own food ?.
(1) Toad
(2) Eugiena
(3) Mucor
(4) Mango tree

Answer: Euglena can prepare its own food.

Question 38. Proteins contain —
(1) Calcium
(2) Magnesium
(3) Iron
(4) Nitrsgen

Answer: Proteins contain Nitrogen,

Question 39. The substance which is nota carbonydrateis
(1) Cane sugar
(2) Sioumin
(3) Lactose
(4) Starcn

Answer: The substance which is not a carbohydrate is Albumin.

Question 40. The antivitamin preventing the action of biotin is
(1) Carotene
(2) Avidin
(3) Pyrithamine

Answer: The antivitamin preventing the action of biotin is avidin.

Question 41. Protein can be digested by —
(1) Ptyalin
(2) Lipase
(3) Pepsin
(4) Maltase

Answer: Protein can be digested by Pepsin.

Question 42. Which one of the following diseases is caused due to deficiency of Vitamin E ?
(1) Night blindness
(3) Infertility
(3) Ricket
(4) Scurvy

Answer: Infertility disease is caused due to deficiency of Vitamin E.

Question 43. The metallic ion essential for blood coagulationis—.
(1) Cat*
(2) Kt
(3) Mg**
(4) Na*

Answer: The metallic ion esser.: al for blood coagulaton is ca**.

Question 44. The major reasen of anaemia in human body is the deficiency of
(1) Iodine in food
(2 Calcium in food
(3) Magnesium in food
(4) Iron in food

Answer: The major reason of anaemia in human body is the deficiency of Iron in food.

Question 45. The digestion of carbohydrates occurs in which of the following in man ?
(1 Buccal cavity
(2) Stomach
(3) Buccal cavity and stomach
(4) Buccal cavity and Small intestine

Answer: The digestion of carbohydrates occurs in buccal cavity and small intestine.

Question 46. The enzyme which is not present in succus entericus is_
(1) Trypsin
(2) Maltase
(3) Sucrase
(4) Lactase

Answer: The enzyme which is not present in succus entericus is trypsin.

Question 47. Deficiency of Iodine leadsto.
(1) Anaemic
(2) Pelagra
(3) Goitre

Answer: Deficiency of iodine leads to goitre.

Question 48. Xeropthalmia is caused by the deficiency of ss.
(1) Vitamin A
(2) Vitamin B12
(3) Vitamin C
(4) Vitamin D

Answer: Xeropthalmia is caused by deficiency of Vitamin A.

Question 49. Atotal Parasiteis_
(1) Mucor
(2) Spirogyra
(3) Swarnlata
(4) Agaricus

Answer: A total Parasite is Swarnlata.

Question 50. Citrus fruits like orange contain
(1 Vitamin A
(2) Vitamin B
(3) Vitamin C
(4) Vitamin D

Answer: Citrus fruits like orange contain Vitamin C.

Question 51. Oxyntic cells are responsible for the secretion of —
(1) Pepsin
(2) Ptyalin
(3) HCI
(4) None

Answer: Oxyntic cells are responsible for the secretion of HCl.

Question 52. Which element is known as enzyme activator ?
(1) Zinc
(2 Copper
(3) Molybdenum
(4) Iron

Answer: Zinc is known as enzyme activator.

Question 53. Osteomalacia is caused by the deficiency of —
(1) Vitamin A
(2) Vitamin D
(3) Vitamin E
(4) Vitamin K

Answer: Osteomalacia is caused by the deficiency of Vitamin D.

Question 54. The organic substance from which energy is not obtained is —
(1 Protein
(2) Carbohydrate
(3) Fat
(4) Vitamins

Answer: The organic substance from which energy is not obtained is Vitamins.

Question 55. The metallic element which is required for the formation of
haemoglobin is —
(1) Iron (Fe)
(2) Calcium (Ca)
(3) Magnesium (Mg)
(4) Potassium (K)

Answer: The metallic element which is required for the formation of haemoglobin is Iron (Fe).

Question 56. Which digestive juice of your body would turn a blue litmus paper red?
(1) salivary juice
(2) bile juice
(3) pancreatic juice
(4) gastric juice

Answer: Gastric Juice turns a blue litmus paper red.

Question 57. Of the following, is a protective food.
(1) carbohydrate
(2) vitamin
(3) protein
(4) fat

Answer: Of the following, vitamin is a protective food.

Question 58. A child has swollen and bleeding gums. Which food could he be given to reduce the symptoms ?
(1) germinating gram seeds
(2) carrot
(3) egg
(4) lemon

Answer: Lemon should be given to him to reduce the symptoms.

Question 60. Deficiency of which mineral causes chlorosis in plant?
(1) Mg
(2) Ca
(3) Na
(4) Al

Answer: Deficiency of Magnesium causes chlorosis in plant.

Question 61. An enzyme which is secreted from stomach is —
(1) Trypsin
(2) Pepsin
(3) Ptyalin
(4) Erepsin

Answer: An enzyme which is secreted from stomach is Pepsin.

Question 62. Which one of the following is a fat soluble vitamin?
(1) vitamin ‘B1
(2) vitamin ‘D’ .
(3) vitamin ‘C’
(4) vitamin ‘B12

Answer: Vitamin ‘D’ is a fat soluble vitamin.

Question 63. The nutrients are —
(1) Vitamins
(2) Minerals
(3) Water
(4) all these

Answer: (4) all these.

Question 64. Fats provides more energy than carbohydrate because —
(1) Fat contains more hydrogen
(2) Fat contains more oxygen
(3) Fat contains more useful substances
(4) Fat contains more carbon.

Answer: (1) Fat contains more hydrogen.

Question 65. Monosacchrides are linked together by —
(1) hydrogen bond
(2) glucoside bond
(3) linkage bond
(4) none of these

Answer: (1) hydrogen bond.

Question 66. The chief stored form of carbohydrate in animals is —
(1) Starch
(2) Glycogen
(3) Sucrose
(4) Maltose

Answer: (2) Glycogen.

Question 67. A derived lipid is —
(1) sterols
(2) phospholipid
(3) glycolipids
(4) fatty acids

Answer: (1) sterols.

Question 68. Cod liver oil is a rich source of —
(1) Vit Band C
(2) Vit A and D
(3) Vit A and C
(4) Vit D and K

Answer: (2) Vit A and D.

Question 69. The calorific value of fat is —
(1) 4.3 kcal
(2) 9.7 kcal
(3) 9.3 kcal
(4) 4.1 kcal

Answer: (3) 9.3 kcal.

Question 70. The simplest form of protein is —
(1) Glucose
(2) Glycerol
(3) Amino acid
(4) Ester

Answer: (3) Amino acid.

Question 71. The essential amino acid is —
(1) Valine
(2) Histidine
(3) Methionine
(4) All

Answer: (4) All.

Question 72. Aderived protein is —
(1) Glycine
(2) Polypeptides
(3) Serine
(4) All

Answer: (2) Polypeptides.

Question 73.An element acts as growth promoter and is present in vit B-12. What is it ?
(1) Chlorine
(2) Copper
(3) Cobalt
(4) Calcium

Answer: (3) Cobalt.

Question 74. Vitamine acts as —
(1) enzyme
(2) co-enzyme
(3) solvent
(4) promoter

Answer: (2) co-enzyme.

Question 75. Caroten is the provitamin of —
(1) VitA
(2) Vit D
(3) Vit C
(4) Vit K

Answer: (1) Vit A.

Question 76. An example of antivitamin is —
(1) Ergosterol
(2) Avidin
(3) Carotene
(4) None of these

Answer: (2) Avidin.

Question 77. Nyctalopia is caused due to the deficiency of —
(1 VitC
(2) Vit D
(3) VitK
(4) VitA

Answer: (4) Vit A.

Question 78. A bone disease due to the deficiency of Vit D is —
(1) Xeropthalmia
(2) Osteomalacia
(3) Beri-beri
(4) Night blindness

Answer: (2) Osteomalacia.

Question 79. The symptoms 3D disease for
(1) Anaemia
(2) Scurvy
(3) Pellagra
(4) Rikets

Answer: (3) Pellagra.

Question 80. The chemical name of Vit E is —
(1) Calciferol
(2) Thiamine
(3) Tocopherol
(4) Riboflavin

Answer: (3) Tocopherol.

Question 81. A total stem parasite is
(1) Cuscuta
(2) Dodder
(3) Swarnlata
(4) All

Answer: (4) All.

Question 82. A partial saprophytic plant is
(1) Mucor
(2) Agaricus
(3) Montropa
(4) Pinus

Answer: (4) Pinus

Question 83. An insectivorous plant is
(1) Nepenthes
(2) Cascuta
(3) Orchid
(4) Cycas

Answer: (1) Nepenthes.

Question 84. The optimum temperature for enzyme activity is —
(1) 20-25°C
(2) 30-40°C
(3) 35-40°C
(4) 30-55°C

Answer: (3) 35—40°C

Question 85. The bile juice is stored in—
(1) Liver
(2) Pancreas
(3) Spleen
(4) Gall bladder

Answer: (4) Gall bladder.

Question 86. The proteolytic enzyme present in intestinal juice is —
(1) Pepsin
(2) Trypisn
(3) Erepsin
(4) Ptyalin

Answer: (3) Erepsin.

Question 87. Lacteals are present in—
(1 Villi
(2) Alveoli
(3) Stomach
(4) Mouth

Answer: (1) Villi.

Question 88. Milk does not contain ~
(1) Vit C
(2) Iron
(3) Calcium
(4) Both a and c

Answer: (1) Vit C.

Question 89. Which of the following supplies nitrogen to the body ?
(1) Carbohydrate
(2) Fat
(3) Protein
(4) Vitamin

Answer: (3) Protein.

Question 90. Which one of the following vitamins is water soluble ?
(1) VitA
(2) Vit C
(3) Vit D
(4) VitE

Answer: (3) Vit C.

Question 91. The major reason of anaemia in human body is the deficiency of
(1) Iodine in food
(2) Calcium in food
(3) Magnesium in food
(4) Iron in food

Answer: (4) Iron in food.

Question 92. The partly digested food in stomach is called —
(1) Chyte
(2) Chyme
(3) Mastication
(4) Chewing

Answer: (2) Chyme.

Question 93. Which one is non-functional in human ?
(1) Caecum
(2) Colon
(3) Gall bladder
(4) Rectum

Answer: (1) Caecum.

Question 94. The largest digestive gland in human body is =
(1) Pancreas
(2) Gastric gland
(3) Liver
(4) Salivary gland

Answer: (3) Liver.

Question 95. Asymbiontic association between plants and animals is —
(1) Algae and fungi
(2) Zoochlorella and hydra
(3) Bacteria and fungi
(4) None of these

Answer: (2) Zoochlorella and hydra.

Question 96. Which one is the heterotrophs from —
(1) Mango
(2) Neem
(3) Mucor
(4) Hibiscus

Answer: (3) Mucor.

Question 97. An organism who breaks up the food before ingestion is —
(1) Tapeworm
(2) Round worm
(3) Bacteria
(4) Cat

Answer: (3) Bacteria.

Question 98. Which one is the example of roughage ?
(1) Pulses
(2) Rice
(3) Dalia
(4) Mango

Answer: (3) Dalia.

Question 99. The process of formation of glycogen from glucose takes place in —
(1) Muscle
(2) Liver
(3) Stomach
(4) Both muscle and liver

Answer: (4) Both muscle and liver

Question 100. The process by which glycogen is breaking down to glucose is called—
(1) Glycogenesis
(2) Glycogenolysis
(3) Glucogenesis
(4) All of these

Answer: (2) Glycogenolysis.

Question 101. Simplest Carbohydrate is —
(1) Polysacchrides
(2) Disacchrides
(3) Monosacchrides
(4) Amino acids

Answer: (3) Monosacchrides.

Question 102. The protein part of an enzyme is —
(1) Co-enyme
(2) Apoenzyme
(3) Prosthetic group
(4) None of these

Answer: (1) Co-enyme.

Question 103. The scientist who first introduced the term enzyme is —
(1) Munch
(2) Lindeman
(3) Kuhn
(4) Loandsteiner

Answer: (3) Kuhn.

Question 104. The digestive juice that does not contain enzymes is —
(1) Saliva
(2) Gastric juice
(3) Bile juice
(4) Pancreatic juice

Answer: (3) Bile juice.

Chapter 3 Physiological Processes Of Life Circulation MCQs

Question 1. Blood of which of the following animals does not contain RBC ?
(1) Earthworm
(2) Toad
(3) Man
(4) Fish

Answer: Blood of Earthworm does not contain RBC.

Question 2. Which one of the following three is not seen in the open type of circulatory system ?
(1) Artery
(2) Haemocoel
(3) Capillary

Answer: Capillary is not seen in the open type of circulatory system.

Question 3. In the blood of which of the following animals, haemocyanin is present ?
(1) Earth worm
(2) Prawn
(3) Cockroach
(4) Toad

Answer: In the blood of Prawn haemocyanin is present.

Question 4. In which of the chambers of human heart, oxygenated blood is
received?
(1) Right ventricle
(2) Left auricle
(3) Right auricle
(4) Left ventricle

Answer: In Left auricle of human heart oxygenated blood is received.

Question 5. Main function of white blood corpuscles (WBC) is to —
(1) Produce Red Blood Corpuscles (RBC)
(2) Destroy bacteria
(3) Distribute heat
(4) Clotting of blood

Answer: Main function of white blood corpuscles (WBC) is to destroy bacteria.

Question 6. Lymph returns to blood through —
(1) Capillary
(2) Artery
(3) Vein
(4) Lymph vessel

Answer: Lymph returns to blood through Lymph vessel.

Question 7. The function of right ventricle is
(1) to transmit oxygenated blood
(2) to transmit blood rich in CO2
(3) to receive blood rich in CO2
(4) to receive oxygenated blood

Answer: The function of right ventricle is to transmit blood rich in CO2.

Question 8. Which one of the following in excessive numbers is responsible for Leukemia (Blood cancer) ?
(1) Microbes
(2) Blood platelets
(3) W.B.C
(4) R.B.C

Answer: W.B.C in excessive numbers is responsible for the Leukemia (Blood cancer).

Question 9. Respiratory pigment present in the blood of man is
(1) Haemocyanin
(2) Haemolymph
(3) Haemocyte
(4) Haemoglobin

Answer: Respiratory pigment present in the blood of man is haemoglobin.

Question 10. Open biood circulation is seen in—
(1) Earthworm
(2) Human
(3) Toad
(4) Cockroach

Answer: Open blood circulation is seen in Cockroach.

Question 11. What are the veins having capillaries at both ends called?
(1) Systemic veins
(2) Pulmonary veins
(3) Portal veins
(4) Vena cava

Answer: Veins having capillaries at both ends are called Portal veins.

Question 12. Which one of the following metallic elements is needed in the formation of haemoglobin molecule? [MP-2002]
(1) Magnesium
(2) Iron
(3) Potassium
(4) Calcium

Answer: Iron is needed in the formation of haemoglobin molecule.

Question 13. Lacteal contains —
(1) Deoxygenated blood
(2) Lymph
(3) Plasma

Answer: Lacteal contains lymph.

Question 14. Which vein of man carries oxygenated blood ?
(1) Portal vein
(2) Renal vein
(3) Pulmonary vein
(4) Facial vein

Answer: Pulmonary vein of man carries oxygenated blood.

Question 15. Mitral valve is present at the —
(1) Junction of right atrium and right ventricle
(2) Junction of left atrium and left ventricle
(3) Ventricle and aorta
(4) Ventricle and pulmonary artery

Ans Mitral valve is present at the junction of left atrium and left ventricle.

Question 16. An animal whose blood does not carry oxygen is
(1) Prawn
(2) Fish
(3) Amoeba
(4) Cockroach

Answer: Cockroach blood does not carry oxygen.

Question 17. In which of the following animals is open circulatory system found ?
(1) Prawn
(2) Earth worm
(3) Toad
(4) Man

Answer: Open circulatory system is found in Prawn.

Question 18. The largest cell of the blood is —
(1) Monocyte
(2) Neutrophil
(3) Eosinophil
(4) Lymphocyte

Answer: The largest cell of the bload is Monocyte.

Question 19. What is the name of the element that helps in blood coagulation?
(1) Sodium
(2) Magnesium
(3) Calcium
(4) Phosphorus

Answer: The element that helps in blood coagulation is Calcium.

Question 20. Which one is related with the other three?
(1) Lymphocyte
(2) Monocyte
(3) Leucocyte
(4) Eosinophil

Answer: Leucocyte is related with other three.

Question 21. Which protein is absent in serum?
(1) Fibrinogen
(2) Globulin
(3) Albumin
(4) Bilirubin

Answer: Fibrinogen protein is absent in serum.

Question 22. The function of left auricle in human heart is—
(1) to transmit oxygenated blood
(2) to transmit blood rich in CO2
(3) to receive blood rich in CO2,
(4) to receive oxygenated blood

Answer: The function of left auricle in human heart is to receive oxygenated blood.

Question 23. In the plasma of which of the following animals is hemoglobin present?
(1) Earthworm
(2) Prawn
(3) Cockroach
(4) Toad

Answer: Hemoglobin is present in the plasma of Earthworm.

Question 24. From which of the chambers of human heart is oxygenated blood transmitted to different parts of the body ?
(1) Right auricle
(2) left ventricle
(3) Right ventricle
(4) left auricle

Ans: From Left ventricle of human heart oxygenated blood is transmitted to different parts of the body.

Question 25.____ in the blood of group ‘0’.
(1) Agglutiongen is not present —_
(2) Agglutinin is not present
(3) Agglutinogen ‘A’, is present
(4) Agglutinogen ‘AB’ is present

Answer: Agglutinogen is not present in the blood of group ‘O’.

Question 26. In which pair of following animals haemoglobin is found ?
(1) Man and cockroach
(2) Cockroach and Earthworm
(3) Man and Earthworm
(4) Prawn and cockroach

Answer: Heamoglobin is found in the blood of man and Earthworm.

Question 27. Heparin is secreted from —
(1) Basophil
(2) Neutrophil
(3) Eosinophil

Answer: Heparin is secreted from basophil.

Question 28. Cardiac muscle is
(1) Voluntary striated
(2) Non voluntary striated muscle
(3) Voluntary smooth muscle
(4) Non voluntary smooth muscle

Answer: Cardiac muscle is non-voluntary striated muscle.

Question 29, Lecuocytes which help in antibody formation is
(1) Eosinophil
(2) Neutrophil
(3) Monocyte
(4) Lymphocyte

Answer: Leucocytes which help in antibody formation is lymphocyte.

Question 30. Lymph is a tissue fluid which contains ~
(1) Leucocytes
(2) Serum
(3) Erythrocytes
(4) None of the above

Answer: Lymph is a tissue fluid which contains leucocytes.

Question 31. Which one is the organic part of blood ?
(1) Albumin
(2).Fibrinogen
(3) Calcium
(4) Urea

Answer: Fibrinogen is the organic part of blood.

Question 32. Life of RBC in man is
(1) 90 days
(2) 120 days
(3) 60 days
(4) 220 days

Answer: Life span of RBC in man is 120 days.

Question 33. Suppose your blood group is ‘0’ you can receive blood from a person 1aving blood group —
(1) Group ‘A’
(2) Group ‘B’
(3) Group ‘AB’
(4) Group ‘0’

Answer: Suppose your blood group is ‘0’, You can receive blood from a person having dlood group ‘0’.

Question 34. The plasma protein that helps in clotting of bloodis—
(1) Prothrombin
(2) Albumin
(3) Fibrin

Answer: The plasma protein that helps in the clotting of blood is prothrombin.

Question 35. The kind of cell absent in lymph is —
(1) Monocyte
(2) Lymphocyte
(3) Basophil

Answer: The kind of cell absent in lymph is Basophil.

Question 36. The agglutinin present in Blood Group B is —
(1) Alpha
(2) Beta
(3) both Alpha and Beta
(4) no agglulitinin at all

Answer: The agglutinin present in Blood Group Bis is Alpha.

Question 37. Haemoglobin is dissolved in Plasma in —
(1) Toad
(2) Earthworm
(3) Man
(4) Camel

Answer: Haemoglobin is dissolved in Plasma in Earthworm.

Question 38. A person with ‘A’ blood group can take blood from ___ blood group
(1) A
(2) 0
(3) B
(4) AandO

Answer: A person with ‘A’ blood group can take blood from ‘A’ and ‘O’ blood groups.

Question 39. Blood coagulation is hampered due to the absence of ___.
(1) Vitamin A and Vitamin K
(2) Vitamin D.and Magnesium
(3) Vitamin K and Calcium
(4) Vitamin A and Calcipm

Answer: Blood coagulation is hampered due to absence of Vitamin K and Calcium.

Question 40. Which component of the blood carries O2 & CO2?
(1) red blood corpuscles
(2) white blood corpuscles
(3) red and white blood corpuscles
(4) platelets

Answer: Red blood corpuscles of blood carry O2 & CO2.

Question 41. The blood corpuscle that causes phagocytosis is
(1) RBC
(2) Platelets
(3) Lymphocyte
(4) Neutrophil

Answer: The blood corpuscle that causes phagocytosis is Neutrophil.

Question 42. In which pair of the following animals haemoglobin is found ?
(1) man and cockroach
(2) mosquito and earthworm
(3) man and earthworm
(4) Prawn and cockroach

Answer: Haemoglobin is found in the blood of man and earthworm.

Question 43. The existence of solvent molecules from the cell is called-
(1) Endosmosis
(2) Exosmosis
(3) Diffusion
(4) Turgidity

Answer: (2) Exosmosis

Question 44. The transport of food from leaf to different parts of the plant is called-
(1) Transpiration
(2) Translocation
(3) Guttation
(4) Circulation

Answer: (2) Translocation

Question 45. Instrument used to measure the rate of transpiration is —
(1) Sphygmomanometer
(2) Ganong’s potometer
(3) Spirometer
(4) Speedometer

Answer: (2) Ganong’s potometer

Question 46. In hydra and starfish, the medium of circulation is —
(1) blood
(2) lymph
(3) water
(3) salt

Answer: (3) water

Question 47. Non-protein nitrogenous substance (NPN) is —
(1) urea
(2) uric acid
(3) creatinine
(4)all

Answer: (4) all

Question 48. The life span of plateletes is —
(1) 1-5 days
(2) 15-20 days
(3) 5-9 days
(4) 100-150 days

Answer: (3) 5-9 days

Question 49. Bile pigments are —
(1) Haemoglobin and haemocyanin
(2) Bilirubin and biliverdin
(3) Plasma and Serum
(4) Platelets

Answer: (2) Bilirubin and biliverdin

Question 50. The ratio of WBC and RBC in our body is roughly —
(1) 1: 20
(2) 1: 100
(3) 1: 500
(4) 1: 700

Answer: (4) 1: 700

Question 51. The WBC cells which are phagocytic in nature are —
(1) Neutrophill
(2) Lymphocytes
(3) Monocytes
(4) Both a and b

Answer: (4) Both a and b

Question 52. Serotonin is secreted from —
(1) Platelets
(2) Basophils
(3) Neutrophills
(4) Eosinophils

Answer: (1) Platelets

Question 53. Heparin, an anicoagulant, is secreted from —
(1) Eosinophil
(2) Basophil
(3) Neutrophil
(4) None of these

Answer: (2) Basophil

Question 54. Haemocyanin is a copper containing pigment of blood found in —
(1) Earthworm
(2) Crab
(3) Tape worm
(4) All of these

Answer: (2) Crab

Question 55. Blood circulation is described by —
(1) William Harvey
(2) Karl landsteiner
(3) August Weisman
(4) Lindemann

Answer: (1) William Harvey

Question 56. The breaking down of RBC is called —
(1) Phagocytosis
(2) Pinacytosis
(3) Haemolysis
(4) Blood clotting

Answer: (3) Haemolysis

Question 57. The elements used in blood clotting is—
(1) Sodium
(2) Potassium
(3) Calcium
(4) Carbon

Answer: (3) Calcium

Question 58. Open circulatory system is found in—
(1) Cockroach
(2) Grasshopper
(3) Snail
(4) All of these

Answer: (4) All of these.

Question 59. Mitral valve is located
(1) between left auricle and left veutricle
(2) between right auricle and right veutricle
(3) between left ventricle and Aorta
(4) none of these

Answer: (1) between left auricle and left ventricle

Question 60. Haemophilia is a –
(1) Bacterial disease
(2) Protozoan disease
(3) Genetic disorder
(4) Viral disease

Answer: (3) Genetic disorder

Question 61. Canal system as circulatory system is found in —
(1) hydra
(2) earthworm
(3) sponges
(4) tapeworm

Answer: (3) sponges

Question 62. In cockroach, the heart is made up of —
(1) four pairs of Pulsatile tubes
(2) asmall sac like
(3) thirteen funnel shaped chamber
(4) three chambered.

Answer: (3) thirteen funnel shaped chamber

Question 63. The covering membrane of heart is —
(1) Meninges
(2) Pleura
(3) Pericardium
(4) Peristoem

Answer: (3) Pericardium

Question 64. The wall of capillaries is formed by —
(1) Endothelium
(2) Exothelium
(3) Mesodirm
(4) All of these

Answer: (1) Endothelium

Question 65. The circulating medium of insect is called —
(1) haemoglobin
(2) haemocyanin
(3) haemolymph
(4) none of these

Answer: (3) haemolymph

Question 66. Ascent of sap in plants takes place through —
(1) Seive tube
(2) Xylem parenchyma
(3) Xylem vessels
(4) Companion cells

Answer: (3) xylem vessels

Question 67. Cohesive – adhesive force theory was proposed by —
(1) Stephan and Hales
(2) Curtis
(3) Dixon and jolly
(4) Munch

Answer: (3) Dixon and jolly

Question 68. Non-nucleated corpusecles present in human blood is —
(1) Leucocytes
(2) Erythrocytes
(3) Lymphocytes
(4) aandc

Answer: (2) Erythrocytes

Question 69. Smallest blood corpuscles is —
(1) Thrombocytes
(2) Erythrocytes
(3) Phagocytes
(4) Monocytes

Answer: (1) Thrombocytes

Question 70. Universal donor is —
(1) group ‘O’ individual
(2) group ‘AB’ individual
(3) group ‘B’ individual
(4) group ‘A’ individual

Answer: (1) group ‘O’ individual

Question 71. Largest artery is —
(1) Vena cava
(2) Aorta
(3) Capillaries
(4) Veins

Answer: (2) Aorta

Question 72. In the absence of which vitamin, blood coagulation does not take place?
(1) vit-A
(2) vit-B12
(3) vit-C
(4) vit-K

Answer: (4) vit-K

Question 73. Which of the following animals has hemoglobin in its plasma?
(1) Earthworm
(2) Prawn
(3) Cockroach
(4) Toad

Answer: (1) Earthworm

Question 74. Which two animals have hemoglobin in their blood?
(1) human and cockroach
(2) cockroach and earthworm
(3) prawn and cockroach
(4) human and earthworm.

Answer: (4) human and earthworm.

Question 75. Which of the follwing metallic elements is required for the synthesis of haemoglobin molecule?
(1) Magnesium
(2) Calcium
(3) Iron
(4) Potassium

Answer: (3) Iron

Chapter 3 Physiological Processes Of Life Excretion MCQs

Question 1. Which of the following alkaloids is found in Rauvolfia?
(1) Morphine
(2) Nicotine
(3) Reserpine
(4) Quinine

Answer: (3) Reserpine.

Question 2. Which one is not a nitrogenous waste product ?
(1) Quinine
(2) Creatin
(3) Daturine
(4) Tanin

Answer: (4) Tanin.

Question 3. Sweat gland is present in —
(1) Kidney
(2) Lungs
(3) Skin
(4) Liver

Answer: (3) Skin.

Question 4. Latex is the excretory product of —
(1) Arjuna
(2) Rubber
(3) Sajina
(4) Apple

Answer: (2) Rubber.

Question 5. The hormone produced in kidney is —
(1) Erythropoietin
(2) ADH
(3) Vassopressin
(4) None of these

Answer: (1) Erythropoietin.

Question 6. Cystolith contain —
(1) Oxylate
(2) Calcium Carbonate
(3) Potassium nitrate
(4) All of these

Answer: (2) Calcium Carbonate.

Question 7. Which of the following alkaloids is found in Cinchona ?
(1) Nicotin
(2) Reserpine
(3) Morphine
(4) Quinine

Answer: (4) Quinine.

Question 8. Raphide is found in —
(1) Banyan
(2) Arum
(3) Guava
(4) Apple

Answer: (2) Arum.

Question 9. Where does ornithine cycle operate ?
(1) In stomach
(2) In liver
(3) In kidney
(4) In spleen

Answer: (2) In liver.

Question 10. Which material makes urine faintly yellowish ?
(1) Blood
(2) Bilirubin
(3) Haemoglobin
(4) Bile pigment

Answer: (2) Bilirubin.

Question 11. Which animal has nephridia as excretory organ ?
(1) Cockroach
(2) Leech
(3) Toad
(4) Tape worm

Answer: (2) Leech.

Question 12. Which of the following alkaloids is used to decrease blood pressure in human ?
(1) Nicotine
(2) Reserpine
(3) Quinine
(4) Morphine

Answer: (2) Reserpine.

Chapter 3 Physiological Processes Of Life Transpiration

Question 1. The loss of unused water of the plant body liberated into the atmosphere in the form of vapour is called —
(1) Evaporation
(2) Transpiration
(3) Guttation
(4) None of these

Answer: (2) Transpiration

Question 2. Transpiration is least in —
(1) High wind velocity
(2) High atmospheric humidity
(3) Dry soil moisture
(4) Dry environment

Answer: (3) Dry soil moisture

Question 3. Which one is an internal factor transpiration ?
(1) Light
(2) Temperature
(3) Wind velocity
(4) Structure of leaf

Answer: (4) Stucture of leaf

Chapter 3 Physiological Processes Of Life Movement Of Water, Minerals, Food And Gases

Question 1. Movement of water in the cortex of root outside to inside is due to —
(1) gradient of chemical potential
(2) gradient of water potential
(3) accumlation of inorganic salts
(4) accumulation of organic solutes

Answer: (5) gradient of water potential

Question 2. The extracellular solutions which contain less concentration of the solutes and having higher solvent concentration than the cytoplasm are known as—
(1) Isotonic solution
(2) Hypertonic solution
(3) Hypotonic solution
(4) None of these

Answer: (3) Hypotonic solution

Question 3. The active hydrostatic pressure created in the parenchymatous cortical cells of the roots is called —
(1) Turgor pressure
(2) Osmotic pressure
(3) Suction pressure
(4) Root pressure

Answer: (1) Turgor pressure

Question 4. Membrane which allows all the molecules or ions of a solution (both solute and solvent molecules) to pass through itis called —
(1) Impermeable membrane
(2) Permeable membrane
(3) Semi-permeable membrane
(4) Selectively permeable membrane

Answer: (2) Permeable membrane

Question 5. Which one is largely responsible for ascent of sap ?
(1) capillary theory
(2) pulsation theory
(3) root pressure theory
(4) cohesion force and transpiration pull theory

Answer: (2) pulsation theory

Question 6. Whaich one of the following helps in ascent of sap ?
(1) capillarity
(2) root pressure
(3) transpiration
(4) all of these

Answer: (4) all of these

 

WBBSE For Class 9 Physical Science And Environment Chapter 1 Measurement MCQS

Chapter 1 Measurement MCQs

Question 1. What is the SI unit of temperature?
(1) Calorie
(2) Kelvin
(3) Centigrade
(4) None of the above

Answer: (2) Kelvin

Question 2. Which unit should be chosen to measure the distance between two stars?
(1) Kilometre
(2) Femtometre
(3) Lightyear
(4) None of the above

Answer: (3) Lightyear

Question 3. Which physical quantity has the dimension \(\left[\mathrm{LT}^{-2}\right]\)
(1) Velocity
(2) Acceleration
(3) Temperature
(4) None of the above

Answer: (2) Acceleration

Question 4. What is the unit of atomic weight?
(1) Gram
(2) Milligram
(3) No unit
(4) None of the above

Answer: (3) No unit.

Question 5. At what temperature density of water is maximum?
(1) 0°C
(2) 4°C
(3) 1K
(4) None of the above

Answer: (2) 4°C.

Question 6. Of the following quantities, which is a scalar quantity?
(1) Velocity
(2) Time
(3) Weight
(4) Force

Answer: (2) Time.

Question 7. The dimension of velocity is
(1)\(\left[\mathrm{LT}^{-1}\right]\)

(2) \(\left[\mathrm{LT}^{-2}\right]\)

(3)\(\left[\mathrm{ML}^{-1} \mathrm{~L}^{-2}\right]\)

(4)\(\left[\mathrm{MLT}^{-1}\right]\)

Answer: (1) \(\left[\mathrm{LT}^{-1}\right]\)

Question 8. Which one is not a fundamental unit?
(1) Metre
(2) Litre
(3) Kilogram
(4) Second

Answer: (2) Litre.

Question 9. A light year is a unit of
(1) Time
(2) Distance
(3) Temperature
(4) None of the above

Answer: (2) Distance.

Question 10. To measure the diameter of an atom, the unit used is 
(1) Ohm 5
(2) Metre
(3) Fermi
(4) Millilitre

Answer: (3) Fermi

Question 11. 1 fermi is
(1) \(10^{-15}\) meter
(2) \(10^{-10}\) meter
(3) \(10^{-5}\) meter
(4) None of the above

Answer: (1) \(10^{-15}\)meter

Question 12. 1 X-unit is
(1) \(10^{-13}\)em
(2) \(10^{-12} \)em
(3) \(10^{-11}\)em
(4) None of the above
Answer: (3) \(10^{-11}\)em

Question 13. 1 light year is equal to
(1) 9.45 x \(10^{10}\) km
(2) 9.47 x \(10^{11}\)km
(3) 9.467 x \(10^{12}\)km
(4) None of the above

Answer: (3) 9.467 x\(10^{12}\)  km.

Question 14. Which one is a scalar quantity?
(1) Acceleration
(2) Velocity
(3) Work
(4) None of the above

Answer: (3) Work.

Question 15. An object has a density of 4 g/c.c. and a volume 20 c.c. What will be the mass of the object?
(1) 80g
(2) 40g
(3) 5g
(4) None ofthe above

Answer: (1) 80g

Question 16. Identify the vector quantity
(1) Mass
(2) Volume
(3) Time
(4) Weight

Answer: (4) Weight.

Question 17. The unit of volume is a
(1) Fundamental unit
(2) Derived unit
(3) None of these
(4) None of the above

Answer: (2) Derived unit.

Question 18. The density of Hg is
(1) 13.6 g/c.c.
(2) 12.6 g/c.c.
(3) 11.6 g/c.c.
(4) None of the above

Answer: (1) 13.6 g/c.c.

Question 19. The watch used in running competitions is 
(1) Pendulum clock
(2) Stop watch
(3) Table clock
(4) One of the above

Answer: (2) Stop watch.

Question 20. The dimension of Retardation is
(1)\( \left[\mathrm{LT}^{-1}\right]\)
(2)\( \left[\mathrm{LT}^{-2}\right]\)
(3)\( \left[\mathrm{LT}^{}\right]\)
(4) None of the above

Answer: (2)\( \left[\mathrm{LT}^{-2}\right]\)

Question 21. 1 parsec is
(1) 30:84 km
(2) 29:75 km
(3) 28:82 km
(4) None of the above

Answer: (1) 30:84 km

Question 22. 1 Astronomical Unit (AU) is
(1) 1.495 x\( 10^8 \)km
(2) 2:57 km
(3) 3:82 km
(4) None of the above

Answer: (4) 1.495 x\( 10^8 \) km.

Question 23. The dimension\(\left[\mathrm{MLT}^{-2}\right]\) corresponds to
(1) Pressure
(2) Momentum
(3) Force
(4) Energy

Answer: (4) Force

Question 24. SI unit of mass is
(1) Gram
(2) Kg
(3) Quintal
(4) Ton

Answer: (2) Kg

Question 25. SI unit of weight is
(1) Kg
(2) Dyne
(3) Newton
(4) Metre

Answer: (3) Newton

Question 26. Select the fundamental unit
(1) Litre
(2) Newt
(3) Ampere
(4) Coulomb

Answer: (3) Ampere

Question 27. The periodic time of a simple pendulum is proportional to the
(1) Its length
(2) Square root of its length
(3) Reciprocal of its length
(4) Square of its length

Answer: (2) Square root of its length

Question 28. The number of basic units in SI system is 
(1) 7
(2) 6
(3) 5
(4) 4

Answer: (1) 7

Question 29. The prefix mega stands for
(1) \(10^9\)
(2) \(10^8\)
(3) \( 10^7\)
(4) \(10^6\)

Answer: (4)\( 10^6\)

Question 30. One liter stands for
(1) \(10^3 \mathrm{~m}^3\)
(2) \(10^{-3} \mathrm{~m}^3\)
(3) \(10^3 \mathrm{~m}^3\)
(4) \(10^3 \mathrm{~m}^3\)

Answer: (2) \(10^{-3} \mathrm{~m}^3\)

31. The dimension of force is
(1)\(\left[\mathrm{M^2LT}^2\right]\)
(2)\(\left[\mathrm{ML}^{-2} \mathrm{~T}^{-2}\right]\)
(3)\(\left[\mathrm{MLT}^2\right] \)
(4) \(\left[\mathrm{MLT}^{-2}\right] \)

Answer: (4)\(\left[ [\mathrm{MLT}^{-2}\right] \)

Question 32. Density is equal to Mass Volume
(1) Mass/Volume
(2) Volume/Mass
(3) Volume x Mass
(4) None of these

Answer: (1) Mass/Volume

Question 33. Newton is a
(1) Fundamental unit
(2) Derived unit
(3) Number
(4) None of these

Answer: (2) Derived unit

Question 34. \(10^{-6}\)m stands for
(1) Nanometer
(2) Mitron
(3) Femtometer
(4) Picometer

Answer: (2) Micron

Question 35. Light year indicates
(1) Time
(2) Distance
(3) A phenomenon of light energy
(4) None of the above

Answer: (2) Distance

Question 36. The unit used to measure the wavelength of visible light is usually
(1) \(10^{-15}\)m
(2) \(10^{-7}\)m
(3) \(10^{-9}\)m
(4) \(10^{-12}\)m

Answer: (3) \(10^{-9}\)m

Question 37. X-ray unit is
(1) \(10^{-3}\)m
(2) \(10^{-13}\)m
(3) \(10^{-6}\)m
(4) \(10^{-4}\)m

Answer: (2) \(10^{-13}\)m

Question 38. Atomic mass unit is used to express
(1) Absolute molecular mass
(2) Relative mass compared to the mass of hydrogen
(3) Comparison between the masses of carbon and oxygen
(4) None of the above

Answer: (1) Absolute molecular mass

Question 39. Dimension of plane angle is
(1) Radian
(2) Zero
(3) Steradian
(4) \(L^{-1}\)

Answer: (1) Zero

Question 40. The unit used to measure the distance between two planets is
(1) Kilometer
(2) Gigameter
(3) \(10^{15}\)m
(4) Lightyear

Answer: (1) Light year

Question 41. Candela is a
(1) Source of artificial light
(2) Unit of solid angle
(3) Unit of luminous intensity
(4) None of the these

Answer: (3) Unit of luminous intensity

Question 42. A physical quantity having magnitude but no dimension is
(1) A point
(2) Mechanical advantage
(3) Mole
(4) Ampere

Answer: (2) Mechanical advantage

Question 43. Dimension of frequency is
(1) \(\mathrm{LT}^{-1}\)
(2) \(\mathrm{T}^{-1}\)
(3)\( \mathrm{ML}^{-3}\)
(4)\(\mathrm{MLT}^2\)

Answer: (2) \(\mathrm{T}^{-1}\)

Question 44. If u = unit, n = magnitude, then the measure is
(1) n/u
(2) \(\mathrm{n}^2 u\)
(3) nu
(4)n+u

Answer: (3) nu

Question 45. Which one of the following is not a physical quantity?
(1) Mass
(2) Volume
(3) Pressure
(4) Length

Answer: (3) Pressure

Question 46. What is the dimensional formula of force?
(1)\(\left[\mathrm{M}^0{L} \mathrm{~T}^{-1}\right]\)
(2)\( \left[\mathrm{ML}\mathrm{~T}^{-2}\right]\)
(3) \(\left[\mathrm{ML}^2 \mathrm{~T}^{-2}\right]\)
(4) \(\left[\mathrm{ML}^{-1} \mathrm{~T}^{-2}\right]\)

Answer: (2) \( \left[\mathrm{ML}\mathrm{~T}^{-2}\right]\)

Question 47. One astronomical (AU) is the average distance between
(1) The sun and moon
(2) The earth and the moon
(3) The earth and the sun
(4) None of these

Answer: (2) The earth and the sun

Question 48. What is the least count of a linear meter scale?
(1) 1cm
(2) 0.1 cm
(3) 0.01 cm
(4) 0.001 cm
Answer: (2) 0.1 cm

Question 49. 1 A is equal to
(1) \(10^{-6}\)m
(2) \(10^{-8}\)m
(3) \(10^{-10}\)m
(4) \(10^{8}\)m

Answer: (3)\(10^{-10}\)m

Question 50. Which one of the following is a fundamental/basic unit?
(1) Lightyear
(2) kg.m/s
(3) kg/m$
(4) Newton

Answer: (1) Lightyear

Question 51. Which one is a quantity with unit but without dimension?
(1) Pressure
(2) Velocity
(3) Solid angle
(4) Area

Answer: (3) Solid angle

Question 52. How many km are there in one light year?
(1) 9.46 x \(10^{15}\)
(2) 9.46 x \(10^{12}\)
(3) 9.46 x \(10^9\)
(4) 9.46 x \(10^6\)

Answer: (2) 9.46 x \(10^{12}\)

Question 53. Unit of temperature in SI system is
(1) °K
(2) K
(3) °F
(4) °C
Answer:  (2) K

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe

Chapter 11 Continent Of Europe

Introduction:

The continent of Europe is a cluster of peninsulas and islands that extends North-West of Asia. Amongst the seven continents of the world, Europe ranks sixth in area.

It occupies about 7% of the land surface of the earth but it has about 15% of the world’s total population. It is important because it is centrally placed in the Northern hemisphere, midway between the Old and the New World.

It has helped in the growth of trade between a number of countries. It is a sub-continent of plains and mountains and a variety of resources. So, Europe’ is the most favorable continent for mankind.

Europe has been called the “most active of the continents” on account of the large volume of its trade and industry and its density of population.

Read and Learn More WBBSE Notes for Class 7 Middle Class Geography

Location:

The continent of Europe (mainland) extends approximately from 35°N latitude (Cape Tarifa of Spain) in the south to 71°N latitude (North Cape of Norway) in the north and from 9°30′ West longitude (Cape Roca) in the west to 65° east longitude (the Ural mountain) in the east.

Thus, Europe covers about 75° longitudes in the east-west and about 35° latitudes in north-south extensions. The island of Iceland, however near the Arctic Circle, is found at 20°W longitude.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Location and Boundary

 

Boundary:

Europe is bounded by the Arctic Ocean, White Sea, and Baltic Sea on the north, the Atlantic Ocean on the west, and the Mediterranean Sea and the Black Sea on the south. On the east, there is a landmass, that the term ‘Eurasia’ is often applied where the continent of Europe merges into Asia and it has no well-defined boundary.

In the absence of better boundaries, the Ural mountains, the Ural River, the Caspian Sea, and the Caucasus mountains may be taken as the eastern limit of Europe. On its three sides-north, south, and west, Europe is bordered by water bodies. In fact, this continent forms a great western peninsula of Asia.

Area and Extension:

Europe is the sixth largest continent in the world. It covers an area of about 10,400,000 square kilometers. It is three and a half times the size of India. The mainland of Europe is about 5760 km from east to west and 3840 km from north to south.

Population:

Though small in size, Europe is the third largest populated continent in the world. Its population is more than 750 million which contributes about 15 per cent to the world’s total population.

 

Chapter 11 Continent Of Europe The Countries Of Europe

Europe is a very small continent, but it consists of about 54 countries. Most of the countries are small in size but very important. In the north are countries like Iceland, Norway, Sweden, and Denmark which are known as ‘Scandinavian countries’.

The Soviet Union (U.S.S.R.) was the largest country in Europe (before 1991). Now it has been divided into 15 independent republics.

Of these, nine republics and a large part of Russia are a part and parcel of Europe, and three of these 15 republics of former U.S.S.R., normally Estonia, Latvia, and Lithuania are. known as Baltic states.

Serbia and Montenegro, Bulgaria, Greece, Romania, Bosnia-Herzegovina, Macedonia, and Albania are known as Balkan states. Greece and Italy are famous for their ancient civilizations.

A small and independent city-state called the Vatican is the seat of the Pope and the headquarters of the Roman Catholic Church. San Marino is the smallest democratic republic state in the world.

 

The Important Countries Of Europe

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Climatic Regions

 

Chapter 11 Continent Of Europe Geographical Importance

Europe is the sixth largest or second smallest (after Oceania) continent in the world. It consists of about 54 countries. Most of the countries are small but very important.

Considering its development in science and technology, agriculture and industry, education and culture, trade and commerce, there is no doubt about Europe’s foremost position amongst the continents of the world. Several geographical factors have contributed to this. These favorable factors are as follows:

 

1. Central position of Europe in the Northern Hemisphere:

Of all the continents Europe is the most centrally located. So, it has easy access to the shores of Africa, Asia, America, and even further Oceania by sea.

2. Nearness to the Seas or Maritime location of Europe:

The continent of Europe enjoys the influence of inland seas, deep bays, and gulfs; so no part of it, except Russia is more than 650 km, from the sea. The seas, bays and gulfs have not only provided ideal sites for fishing but have made the people of Europe sea-minded.

They encouraged the discovery of unknown lands and trade routes. They have affected the life of the people of the world with their ideals, movements, and inventions. As such for centuries Europe occupied a unique position in the world.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Political Map

 

3. Broken Coastline Of Europe:

Considering its size, the continent of Europe has the longest coastline of 38,400 km as compared to all the other continents. The coastlines of Europe are irregular and broken in most places which favors the development of a maximum number of modern ports in the world.

World-famous ports like London, Rotterdam, Genoa, and Marseilles are important.

4. Temperate Climate of Europe:

Europe is the only great landmass that lies almost entirely within the temperate zone. So, here the cool temperate climate enables people to work for long hours.

5. Extensive fertile plains:

Europe has extensive fertile plains and it has the greatest proportion of agricultural land and habitable land than any other continent. There are no large deserts in the whole continent, except for the cold desert of Tundra in its northernmost part.

6. Water Resource:

Numerous navigable rivers are flowing in different parts of Europe. These rivers supply drinking water, irrigation water, and industrial water also.

7. Forest Resource:

Europe is endowed with coniferous forests. Extensive coniferous forests of pine, fir, and birch trees have helped in the tremendous growth of paper and ship-building industries in Europe.

8. Mineral Resource:

Europe is enriched in different types of minerals. The important minerals are petroleum, coal and iron ore.

9. Agricultural Resource:

Europe is highly developed in agriculture. Agriculture in Europe is highly mechanized. Important cereals are wheat, barley, maize, oat, and sugar beet, vegetables and flowers are also grown here. Ukraine is popularly called the “Granary of Europe”.

10. Animal Resource:

Europe is famous for animal products. Russia, Ukraine, Denmark, Netherlands, Germany, the U.K., and France practice cattle and sheep rearing on rich pastures by applying modern techniques. So, milk and milk products, meat, and wool are produced on a commercial basis in Europe.

11. Developed Fishing grounds:

The continental shelf of northwest Europe is famous for fishing grounds. So, countries like Iceland, Norway, U: K., Denmark, Germany, and France are famous for commercial fishing.

The world’s most skilled fishermen are found in Iceland and Norway is called the “Land of Fishermen”.

12. Industrial Development:

Europe is the home of the ‘Industrial Revolution’ and presently the most industrialized part of the world. Most of the important industrial regions of the world namely, Ruhr industrial region, Moscow industrial region, London Basin, Paris Basin, and Donets industrial region are located in Europe.

13. Preservance and Resourcefulness of the people:

The people living on this continent are energetic, enterprising, and progressive. Europe’s economy, ruined twice by world wars recovered mainly due to the sheer presence and resourcefulness of its people.

So, the favorable physical environment and the most dynamic working ability of the Europeans have made this continent geographically very much important in the whole world.

 

Chapter 11 Continent Of Europe Physical Features Of Europe

Relief:

Europe is a very small continent but physiographically it is very much diversified. Though the greater part of the continent is plain land, it also has high plateaus, mountains and very low-lying areas.

Generally, the continent can be divided into the following four distinct physiographic divisions, namely-

  1. The North-western Highlands;
  2. The Great North-Central European Plains;
  3. The Central Plateaus and Uplands; and
  4. The Alpine Mountain system or Southern Mountains of Europe.

 

The North-Western Highlands

The north-western part of Europe is a region of highlands. Mountainous lands of Scandinavia (Norway and Sweden). Finland, the highlands of the north-central U.K., and the northern mountains of Ireland are included in this region.

Physiographic characteristics of this region are as follows:

  1. These mountains are the oldest in Europe. For a long time, they remained under the erosive influence of running water and the glaciers.
  2. Most of these mountains and plateaus are low and have very gentle slopes.
  3. These mountain ranges penetrate deep into the sea.
  4. At certain places (as in Norway) long, narrow, and deep arms of the sea, penetrate into the land between high cliffs. They are known as ‘fiords’. Fiords are in fact deep valley cuts by glaciers and are now filled with water. They make the coastline highly indented and rugged.
  5. The mountain ranges of this region have eroded for a long period and reduced to a plateau land.
  6. Geologically it is composed of ancient metamorphic rock. The area near the Baltic Sea is known as the ‘Baltic Shield’.
  7. There are different mountain ranges. Caledonian mountain ranges have originated 40 to 50 crore years ago. These are-
  8. Doverfield of south-west Norway,
  9. Kiolen mountains along the Norway-Sweden border,
  10. Grampian Mountains in northern U.K. and Cheviot hills of Central U.K. ‘Glittertind’ (2470 m) located to the south of Doverfield is the highest peak of Scandinavia. ‘Ben Nevis’ (1344 m) of Grampian mountain is the highest peak in the United Kingdom.
  11. Lakes are common everywhere and are, actually, traces of ancient ice sheets. There are more than 40000 lakes in Finland which are, therefore, called the ‘Land of thousand lakes’ or the “Country of ten thousand lakes’.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Physical Features Of Europe

 

The Great North-Central European Plains

These plains extend from the Ural mountains in the east to the Bay of Biscay in the west and are located to the south of the north-western highlands. Southern parts of the U.K., Northern France, Netherlands, Belgium, Poland, Northern Germany, and Western Russia are included in this region.

Physiographic characteristics of this region are as follows:

  1. These plains are not flat like the Indo-Gangetic plain. In certain places, they are gently rolling areas and in others, they are broken by mountain chains and hills.
  2. The average height of the plain is 180 m. But it is a little higher in the east. A few small hills are also found, such as Voldai Hills (305 m).
  3. Most of the long rivers of Europe are flowing through this region. These are Volga, Rhine, Don, and Dnieper.
  4. Many large lakes in Europe were formed by glacial erosion, such as Ladoga (18130 sq. km) and Onega (9842 Sq. Km) in Russia. Ladoga is the largest lake in Europe.
  5. An extensive area has been reclaimed from the sea in the Netherlands and is known as ‘Polder land’.
  6. These plains also contain regions of old rocks that are rich in metallic minerals.
  7. High-grade fossil fuels, like coal, petroleum, and natural gas have been abundantly found in many areas.
  8. The greater parts of these plains have excellent soil for agriculture.

 

The Central Plateaus And Uplands

To the south of the Great Plains of Europe, lies the Central Plateau Region and Uplands of Europe. It comprises the Meseta of Spain, the Central Plateau of France, the Rhine highlands, the Bohemian plateau along the Germany-Czech Republic .boundary, and the islands of Sardinia and Corsica.

The physiographic characteristics of this region are as follows.

  1. These are all much lower than the Alpine mountains and are composed of older rock.
  2. They are considered to be the broken blocks of an old mountain system.
  3. Once they were high but now not so high. Their height is not more than 600 meters above sea level.
  4. They extend from west to east from Ireland to Russia.
  5. About 32 to 22 crore years ago fold mountains of the Herceynian system were formed. Subsequently, they have been reduced to these low plateaus.
  6. Many rivers flowing through this region have dissected the plateau into smaller units, such as-
  7. Meseta of Spain,
  8. Brittany of France,
  9. Ardennes of Belgium and
  10. Don Massif of Russia.
  11. Due to faulting block mountains namely the Vosges in France and the Black Forest in Germany have formed.
  12. In between the block mountains of Vosges and the Black Forest is located the rift valley of the Rhine.

 

The Alpine Mountain System Or Southern Mountains Of Europe

To the south of the central Plateaus and Uplands, there are several ranges of young fold mountains running parallel to one another from the Atlantic Ocean in the west to the Caspian Sea in the east. It covers most parts of southern Europe in Spain, France, Germany, Switzerland, Italy, Greece, Bulgaria, and Romania.

Physiographic characteristics of this region are as follows:

  1. These mountains have high (lofty) peaks, steep slopes, and deep valleys.
  2. Among these mountains, the Alpine system or Alps are the most important. They run in great curves from east to west across Southern Europe.
  3. About 6 to 7 crore years ago, the young fold mountain, the Alps originated in the Tertiary period.
  4. There are many lofty peaks are found in the Alps. Mt. Blanc (4807 meters) is the highest peak of the Alps. The other important peaks are Mt. Rosa (4634 meters) and Matterhorn (4478 meters).
  5. There are several other important mountain ranges that run in different directions.
  6. The Pyrenese is extended along the border of Spain and France.
  7. Appenine range extends to the whole length of Italy and crosses over to Africa.
  8. The Dinaric Alps run along the Adriatic sea in Serbia and Albania. Dinaric Alps is further extended southward as Pindus in Greece and Rodhop in Bulgaria and Turkey.
  9. The Carpathian Mountains make a semi-circle and enclose the Plain of Hungary and run east to west in Bulgaria
  10. The Caucasus Mountains lie between the Black Sea and the Caspian Sea. The Caucasus is the highest mountain in Europe. The highest peak of the Caucasus, Mt. Elbrus (5642 meters) is the highest peak in Europe.
  11. These young mountains receive heavy rainfall and are covered with snow and glaciers.
  12. They contain many lakes and give birth to important rivers in Europe.
  13. There are some important passes on the Alps, such as
  14. Brenner,
  15. Simplon,
  16. Seniors,
  17. St. Bernard and
  18. St. Gotthard.

The fertile plains enclosed by these mountains are. the plain of Lombardy or the Po Valley and the Hungarian and Wallachian Plains of the Danube. The southern fringe of Europe is a region of broken mountain chains, peninsulas, and islands.

Volcanoes:

The recent uplift of the Alps has made this Mediterranean belt unstable. So, this belt is prone to earthquakes and volcanicity. Many volcanoes exist in the northwestern and in southern parts of Europe. These are-Crafla and Hekla in north-western Europe.

Etna(3323 m) on Sicily Island, Vesuvius (1227 m) in Italy, and Stromboli on Lipari Island are located in southern Europe. “Stromboli” is called the ‘Lighthouse of the Mediterranean’ which erupts nearly every hour.

 

Chapter 11 Continent Of Europe The Drainage System Or Rivers Of Europe

The continent of Europe has many rivers. These rivers are important resources in Europe. The specific characteristic features of these rivers are as follows:

  1. The rivers of Europe are not very long in comparison to the rivers of Asia, the Americas, and Africa.
  2. The Alps in the south and Voldai in the east of the continent are two main water divides from which many rivers have originated.
  3. One important characteristic feature of the Europeans was. rivers are the intricate network of canals that link them.
  4. The swift-flowing rivers of Europe. are suitable for the generation of hydroelectric power.
  5. There are many navigable rivers in Europe. They serve as important transport routes for the industrial countries through which they flow
  6. At the heads of their estuaries and long their banks stand some of the world’s chief cities.
  7. There are some fertile riverine plains in Europe which are developed in agriculture, e.g. Lombardly or Po valley in Italy.”
  8. The rivers are of great economic importance as they serve the most important industrial regions of Europe as well as the world.

Important Rivers Of Europe

According to their direction of flow, the rivers of Europe may be grouped into the following categories.

  1. North flowing rivers,
  2. South-flowing rivers,
  3. East-flowing rivers and
  4. West flowing rivers.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Important Rivers Of Europe

 

The North Flowing Rivers Of Europe

1.The Loire (1020 Km):

The Loire is the longest river in France. It rises in the “Central Massif” of France, passes through a rift valley, and flows to the northwest before it meets the Bay of Biscay. Orleans and Nantes are important towns on the Loire.

2. The Rhine (1320 Km):

The river Rhine rises in the Swiss Alps and flows through Switzerland, France, Germany, Netherlands, and finally drains into the North Sea at Rotterdam in the Netherlands. As a commercial artery, the Rhine is unrivaled among the rivers of the world. The Neckar, Main, and Moselle are the chief tributaries of the river.

3.The Seine (780 Km):

River Seine rises in the Cote D’or hills located in the northeast of France, flows through Paris Basin, and drained into the English Channel. It is the most important river in France. As the Seine enters Paris, it receives its great tributary, the Marne and after crossing the capital city, it receives the Oise. Le Havre on the estuary is the greatest port in France.

4.The Elbe (1165 Km):

The Elbe is a river in Central Europe. It rises in the Alps of the Czech-Polish border and flows across the Czech Republic and Germany to the North Sea. The river is connected by canals with the Baltic Sea, the Ruhr region, and the Rhine.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Europe River

 

5.The Vistula (1047 Km):

The Vistula is the longest river in Poland and it is also the largest of the rivers meeting the Baltic Sea. It rises from the Alps flows eastward and then northward through Poland and empties into the Baltic Sea after forming a delta. Warsaw, the capital of Poland, lies on the Vistula.

6. The Oder (930 Km):

The Oder is a major river in northern Europe. It rises in the Oder mountains of the Czech Republic, flows through Poland and Germany and empties into the Baltic Sea.

7. The Onega (400 Km):

It rises from the Voldai, flows northward and is drained into the North Sea.

8.The Pechora (1940 Km) :

River Pechora rises in the middle of Ural mountain flows northward and drains into the North Sea (Arctic Ocean).

9. The Muse (925 Km):

River Muse originating from Vosges mountain flows through France, Belgium, and Netherlands and is drained into the North Sea.

10. The North Dvina (750 Km):

This Russian river rises in the Voldai; adjacent to the Ural mountain, flows across the Russian Platform and enters into the White Sea.

 

The South-Flowing Rivers Of Europe

1.The Volga (3690 Km):

The longest river in Europe is the Volga and it is the main waterway of Western Russia. The river rises in the Voldai hills, northwest of Moscow, and flows south-eastwards, through Russia to empty into the Caspian Sea near Astrakhan. Rivers Oka and Kama are two important tributaries of the river Volga.

2. The Ural (2438 Km):

The third longest river in Europe is the Ural. It rises in the south-eastern Ural mountains. It flows south and then southeast and empties into the Caspian Sea. The river marks the boundary of Europe and Asia, south of the Ural mountains.

It is navigable for 1460 Km but freezes in winter. It is connected with the Volga by a canal.

3.The Rhone (813 Km) :

Emerging from the Rhone glacier in the Swiss Alps, the river flows over Switzerland and France to meet the Mediterranean Sea.

4. The Ebro (800 Km):

The Ebro is the longest river in Spain. It rises in the Cantabrian mountains and empties into the Mediterranean Sea.

5.The Dnieper (2285 Km):

The Dnieper is the fourth largest river in Europe. It rises in the Voldai hills, flows southward through Belarus and Ukraine, and meets the Black Sea. About 1669 Km stretch of the river is navigable for ten months. Important cities on the river include Kyiv and Dniepropetrovsk.

6.The Dniester (1352 Km):

The Dniester is a river of Moldavia and southwestern Ukraine. It rises in the Carpathians and flowing south and east, meets the Black Sea near. Odessa.

7. The Don (1920 Km):

It rises in the Central Russian highlands near Tula. It flows to the south and enters the Sea of Azov. The Donetz is an important right-bank tributary of the river. Rostov is the largest river port on the Don.

 

The East-Flowing Rivers Of Europe

1. The Danube (2857 Km):

The Danube is the second-longest river in Europe. It rises in the Black Forest mountain of Germany and flows through nine countries of south-eastern Europe, such as Germany, Austria, Hungary, Romania, etc. finally it splits into three channels and meets the Black Sea forming a delta.

In the Hungarian Plain, the Danube receives three large tributaries-the Drava, Sava, and Tisza. On its banks lie four capital cities-Viena, Bratislava, Budapest, and Belgrade. There is no river in the world that flows along nine countries, as well as four capitals of them, are situated on the banks of the river.

So, it is called the ‘best international river of the world’ or ‘The most significant international river’.

2. The Po (660 Km) :

The Po is the longest river in Italy. It rises in the Italian Alps and flows eastward to the Adriatic Sea. The fertile Po valley is also known as the ‘Plain of Lombardy’.

3. The Thames:

The Thames is an important river of U. K. It rises in the Cotswold Hills in the west and enters the region through the Goring Gap. The river flows eastward and drains into the Dover Strait.

 

The West-Flowing Rivers Of Europe

  1. The Tagus (905 Km): It rises in Eastern Spain and flows through Lisbon in Portugal to meet the Atlantic Ocean.
  2. The Guadalquivir (657 Km): It rises in the Andalusian mountains in Southern Spain and empties into the Atlantic Ocean.
  3. The Western Dvina (1005 Km): It rises in Voldai Hills, near sources of the Volga and the Dnieper, flows southwest and
    westward, and enters into the Baltic Sea.
  4. The Garonne (572 Km): It rises on the slopes of the Pyrenees, in Spain, flows northwestward, and enters into the Bay of Biscay.
  5. The Clyde (170 Km): This is an important river in the United Kingdom. It rises in the Lother hills of the Southern uplands. It flows along the Mid-valley of Scotland towards the west and empties into the Atlantic Ocean.

Lakes of Europe:

Innumerable lakes are found in Europe. They may be grouped as follows.

Lakes in the Plainland:

There are many important and large lakes found in the plain land of Europe. Two large freshwater lakes of Europe Ladoga (18130 sq. km) and Onega (9842 sq. km) are located in the northwest of Russia.

Ladoga is the largest lake in Europe. Other important lakes are Saima in Finland; Vanern or Vener, Vetter or Vattern in Sweden; and Balaton in Hungary.

Lakes in the Mountainland:

There are many picturesque lakes in the Alps region of Switzerland, such as Zurich, Geneva, Lucerne, and Constance. Near the border of Italy are Lugano, Como, Garda, and Maggiore lakes. In England, there is Windermere, Ullswater, and in Scotland is Lomond. All these mountain lakes are very much attractive to tourists.

Finland in Europe is known as the ‘Country of Lakes’ as there are about forty thousand lakes here.

 

Chapter 11 Continent Of Europe Climate Of Europe

 

The climate of Europe is generally temperate in nature. But there are great variations from one region to another. The important characteristics of the climate of Europe are as follows:

  1. The climate of Europe is primarily mild and moderate.
  2. Moderate rainfall occurs throughout the year.
  3. Due to the influence of latitude temperature gradually decreases from south to north.
  4. Westerlies are permanent winds; so the rain is fairly well distributed.
  5. The altitude of the Alps mountains and the plateaus influence temperature conditions.
  6. Warm North Atlantic Drift along Western Europe keeps the seas ice-free.

 

Factors Affecting The Climate Of Europe:

Although the continent of Europe is small in size and lies in the temperate zone, its climate varies from one region to another because of the following factors:

1. Latitudinal Extent:

Europe extends from 35°N to 71°N latitude and thus, nearly the whole continent lies within the temperate zone. As the midday sun is never overhead beyond the tropical region, temperatures are never very high and decrease towards the poles.

So, the Mediterranean region of southern Europe is sunnier and warmer than the Tundra region of the extreme north.

2. Influence of the Sea:

Western and southern Europe lie beside the Atlantic Ocean and the Mediterranean Sea respectively. So, they have an equable climate with mild winters and warm summers. The severity of the climate increases eastwards due to greater distance from the sea. Thus, eastern Europe has hot summers and very cold winters.

3. Altitudinal factor:

Location of Highlands-The effectiveness of any wind depends largely on the layout of the highlands. Higher Alpine mountains and the highlands of Scotland and Scandinavia influence the climate by obstructing the air masses.

The altitude of the Alps mountains and the plateaus influence temperature conditions also.

4. Influence of Winds :

Nearly the whole of Western Europe is under the influence of the. south-west westerlies which blow all through the year. These winds cause rainfall throughout the year with a winter maximum, except in the south where trade wind blows in summer.

5. Influence of Ocean Currents :

Western Europe is comparatively warmer than the eastern coast of any continent in the same latitude. This is because the warming influence of the warm North Atlantic Drift is carried to the shores of Europe by the south-westerly winds.

The same warm current keeps the ports of Norway in north-western Europe ice-free even in winter. On the other hand, in the Gulf of Bothnia which lies away from the influence of the North Atlantic Drift, ports remain ice-bound in winter.

 

Chapter 11 Continent Of Europe Seasonal Conditions Of The Important Elements Of Climate In Different Parts Of Europe

Temperature :

In general, temperature decreases from the south to the north. In summer when the sun is overhead in the Northern hemisphere, the sun’s rays are more direct in Southern Europe than in the north.

Thus Southern Europe becomes warmer than Northern Europe. Temperature decreases from 27°C in the south to below 15°C in the north.

In winter, due to the influence.. of the ocean current temperature remains around 10°C in the west. But in the north-east temperature drops too. -12°C.

 

Air Pressure And Wind

As the world pressure belts swing to the north in summer in the northern hemisphere, the southern hemisphere part of Europe comes under dry north-east Trade wind.

But moist south-westerly winds blow over the rest of the continent. In winter, world pressure belts shift to the south and the westerly replaces the Trade wind in the Europe.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Temperate and Winds Of Europe

 

Rainfall

Moistsouth-westerly wind gives rain all over the continent, but the amount decreases from west to east. In summer, the westerlies after causing rainfall (50- 100 cm) in north-western enter further inland where low pressure prevails due to higher 15°Ctemperatures.

Thus most of the rain (25 cm to 50 cm) in central and eastern Europe, comes in summer where rainy periods alternate with dry hot spells. Along the Norway coast, rainfall is 200 cm. In the Philly region, it is 100cm – 200cm.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Annual Rainfall Of Europe

 

Chapter 11 Continent Of Europe Climatic Regions

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Climatic Region

 

The continent of Europe can be divided into the following climatic regions on the basis of variations in temperature and rainfall.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Climatic Regions

 

Chapter 11 Continent Of Europe Natural Vegetation Of Europe

The characteristics of natural vegetation depend on climate. Natural vegetation in Europe has been greatly influenced by climate. The variety in climate has resulted in the variety of natural vegetation. Europe has five major natural vegetation belts, which are as follows:

 

The Tundra Vegetation

In extreme northern parts of Europe in Norway, Sweden, Finland, and Russia due to long winters (9/10 months), the ground remains frozen. So, only in short summer (2/3 months) when the surface thaws, Grass Tundra like mosses, lichens, and colorful flowers grow.

Bush Tundra namely birch, willow, alder, and juniper, grow in the south where the temperature is a little more. The region is named after the vegetation ‘Tundra’ means moss/ algae.

 

The Taiga Or Coniferous Vegetation

To the south of the Tundra lies the Taiga Region in Norway, Sweden, and Russia there is an extensive forest of softwood coniferous trees. Tall and straight trees like pine, fir, spruce, larch, etc. Due to severe Snowfall trees are conical with small needle-shaped leaves.

These trees yield valuable softwood for making wood pulp and for use as timber. Fruit-bearing trees are rarely found in this belt. This forest in Asia is called ‘Taiga’ which is the largest forest in the world.

 

Deciduous And Mixed Forest Belt

South of the coniferous belt in Central and Western. Europe there lies this belt extending from the British Islands to the central parts of Russia. This is a region of mixed forests.

Both coniferous trees and mostly deciduous trees which shed their leaves in Autumn or winter flourish. So, Autumn is referred to here as “Fall”.

The forest is also known as ‘Temperate Hardwood Forest’. Trees like oaks, ash, beeches, maples, chestnut, birch, and poplar are common and are mixed with pines.

Forests are found because rainfall is enough and the dry season is not long. These trees are not tall and there are a number of meadows or open ground amidst them.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Natural Vegetation

 

The Mediterranean Vegetation Belt

This belt is confined to Southern Europe along the Mediterranean Sea coast. It includes countries such as Southern France, Italy, Greece, etc. This belt has sunny warm (24°C) and dry summers and mild (80°C) and wet (75 cm) winters.

This type of climate supports evergreen trees and scrub which have special devices to combat long periods of drought and summer. heat. The trees grown here have long roots and thick bark to resist drought. They have broad, thick, and waxy or oily leaves. They are not tall and straight like the trees of the Taiga region.

The common trees are olive, cork-oak, cedar, laurel, chestnut, stone-pine, walnut, fig, citrus trees, and vine.

 

The Steppe Grasslands

The word ‘Steppe’ comes from the Russian word “Step” meaning “a vast treeless plain”. In the south-eastern and central part of Europe where rainfall is very low, there is an extensive temperate grassland known as the “Steppe grasslands”.

This region extends over the area of Southern Russia and the plains of the Danube in Romania and Hungary. The natural vegetation of this region consists of grasses and herbs.

However, along the banks of the rivers, where sufficient water is available, willow, elm, maple etc. are found. The short but soft, juicy grasses of the Steppes offer an ideal grazing ground.

 

Chapter 11 Continent Of Europe Ruhr Industrial Region

Introduction:

The Ruhr industrial region of Westphalia in Germany is named after the Ruhr, a tiny tributary of the Rhine. It is one of the best industrial regions in Europe as well as the world.

The present Ruhr industrial region has more than 30 to 35 large cities which have merged to form the world’s largest ‘Industrial Conurbation’. (‘conurbation’ is a term meaning a continuous industrial area formed by the merger of many industrial cities and towns).

Location:

Ruhr industrial. the region is located at the confluence of the river Rhine and its tributary the Ruhr. The region once occupied the area between the Lippe and Ruhr rivers. At present, it extends up to the Wupper valley in the south and Munchen Gladbach in the southwest.

Boundary:

This region is bounded to the north by the river. Lippe; on the west by the Vosges and Rhine river; on the south and east by the Sayarland highlands.

Area and Extension:

The present Ruhr industrial region covers about 4600 sq. km area and stretches for 130 km in the east-west extension and 65 km in the north-south extension.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Ruhr Industrial Region

Physical Environment Of Ruhr Industrial Region

Physiographic characteristics:

The region is almost flat with an average elevation of around 250 meters above sea level and slopes gently from east to west. In some places are found small hills made of sands, stones, and pebbles deposited by glaciers in the ice age.

Rivers:

The Rhine is the principal river of the Ruhr industrial region. The Rhine is joined by its four tributaries (Ruhr, Lippe, Elms, and Wupper) flowing through this region. All of them are interlinked by canals and provide a good navigation system.

Climate:

The climate of this region is cool and temperate in nature. Well-distributed rainfall (Average annual rainfall is about 50 cm to 70 cm) and favorable temperature (Summer 15°C and winter around 0° -2°C) assist both agriculture and industry in the Ruhr region.

Soil:

Fertile alluvial soil along the riverbanks, podzol soil in the north, and chernozem soil in the south are found here which are good for agriculture.

Natural Vegetation:

Forests in this region have been filled and cleared to a considerable extent as agriculture, industry, and settlements have grown.

Planned afforestation has been done to control the pollution caused by the industrial region. Trees like oak, birch, elm, pine, fir, etc. are commonly found in the reserve forests of this region.

 

Economic Environment Of Ruhr Industrial Region

Agriculture:

This region is dominated as an industrial region and is not very much developed in agriculture. However, mixed farming is practiced to satisfy the demand of urban people. Crops such as wheat, barley, potatoes, sugarbeet, and a variety of vegetables, fruits, and flowers are grown in this fertile plain.

They supply most of the agricultural needs of the industrial towns. Cattle and sheep are also reared to produce milk, meat, wool, etc.

Minerals:

The greatest asset of the Ruhr region is the presence of 130 thick seams of excellent cooking coal and best quality anthracite and bituminous coal. It accounts for 80% of the total coal production of Germany. This plays an important role in the development of industries here.

So, coal is the lifeline of this region. Other important minerals of this region are lead, zinc limestone, and low-grade iron ore. Petroleum is also mined in some areas.

Transportation system:

Ruhr industrial region is well developed in different modes of transportation such as roadways, railways, and waterways. The Rhine is the busiest and most navigable waterway in Europe.

This river along with its tributaries, namely the Ruhr, the Lippe, and the Dortmund-Ems and Lippe canals provide cheap access to the North Sea. There is also a dense network of rail and roads in the region.

Industries:

This is the most important industrial region of the world. The region accounts for more than 80% of the steel output of Germany. It is also the leading manufacturing district for coal by-products, metal products, machinery, textiles, and chemicals.

 

Causes For The Development Of The Ruhr Industrial Region

Factors favoring the growth of industries in the Ruhr region are as follows:

  1. Availability of High-grade local coal: There is a large-excellent coalfield (Westphalia) in between Rhine, Lippe, and Ruhr rivers. This is the lifeline of this region.
  2. Raw Materials: Iron ore which is found in Siegerland, also imported by waterways from France (Lorraine), Sweden, and Spain. Limestone, though available in this region, is also imported.
  3. Excellent Transportation System: Roadways, railways, and waterways, especially rivers and canals of this region serve excellent transportation network essential for the such industrial growth of this region. They also facilitate the export of finished goods.
  4. Power Resources: Sufficient supply of thermal power from coal and cheap hydel power which help the industrial development of this region.
  5. Water Resource: Clean and soft water required in industries is provided by the Ruhr, Rhine, and Wupper. To ensure water supply, reservoirs have also been constructed on the rivers.
  6. Local Skilled Labour: Plenty of very skilled and experienced labor is locally available. This has led to a high degree of specialization in industries.
  7. Adequate Capital: Germany is one of the well affluent countries in the world. There is no dearth of capital from the rich local traders for the development of the industries in the early phases.
  8. Improved Technology: Germany is noted for its technological advancement. So, the Ruhr region is also facilitated by it.
  9. Dense Population/Market: Ruhr region is densely populated. So laborers required for industrial growth as well as demand and market for the finished goods are easily available.
  10. Government Policy: The German government has always encouraged research to develop new and more efficient techniques of industrialization.

 

Industries And Industrial Centres Of The Ruhr Region

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Industrial Centres Of Ruhr Region

 

Queen of the Ruhr:

The most important steel works, for this reason, are at Essen which is located in the Ruhr heartland. The city known as the ‘Queen of the Ruhr’, boasts of the iron and steel industry run by the famous company ‘Krupps and Demag’.

Manchester of Germany:

Gladbach is the most important textile center of the region and is famous as the ‘Manchester of Germany’.

Ruhrgrebeit:

The heart of the Ruhr industrial region called the ‘Ruhrgrebeit’ extends from Dortmund to Duisberg and accounts for the production of 80% of the country’s steel.

Population and Settlement:

Due to the development of transportation and industries, this region is densely populated. Settlements are found to be uniformly thick right through the region from south to north.

Important cities:

Important towns and cities of the Ruhr industrial region are-

  1. Dusseldorf,
  2. Duisberg,
  3. Dortmund,
  4. Essen,
  5. Wuppertal and
  6. Cologne.

 

Chapter 11 Continent Of Europe London Basin

Introduction:

The lower Thames Basin lies in the south-eastern corner of the United Kingdom, and is called the ‘London Basin’. The word ‘Basin’ means ‘lowland formed by a river’.

London, the capital of England as well as the United Kingdom is located in a saucer-shaped lowland surrounded by highlands, except for a small portion in the east.

This region of lowland is formed by the Thames river as such the basin named the capital city of London is called London Basin’.

Location :

London Basin is located in the southeastern part of Great Britain in the lower Thames river basin. The river Thames flows through nearly the centre of the region from the west to the east.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe London Basin

 

Boundary:

Except in the east, the London Basin is surrounded by highlands. It is bordered on the north by Chiltern Hills and the south by North Downs and Hampshire Downs.

The western boundary of the basin is the Berkshire Downs and White Horse Hills. At the eastern boundary where the land is flat, the Thames river flows over it to the Dover Strait.

Area and Extension:

London Basin comprises about 7750 sq. km. The core of the London Basin is represented by the Greater London area, stretching from Enfield to Epsom and from Oxbridge to Upminister, surrounded by the chalk dip slopes.

Population:

The population of the London Basin is about 12.5 million.

 

Physical Environment Of London Basin

Physiographic Characteristics:

The London Basin is a triangular shallow depression or trough formed by a downfold in the chalk upon which has been deposited sands, gravels, and clays. The basin is not evenly flat Glacier-borne stones, and pebbles have accumulated in places to form an undulating surface.

The bordering hills have steep slopes and are made of chalk and limestone. The height of the North Downs varies between 270 to 320 meters while that of Chiltern Hills in the north varies between 235-250 meters.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Geological Structures Of London Basin

 

London Basin may be sub-divided as follows :

  1. The Chiltern Dip Slope,
  2. The North Downs Dip Slope,
  3. The Middle Thames valley,
  4. The Lower valley of the Kennet,
  5. The Lea valley,
  6. Lower Thames Estuarine Zone and
  7. Greater London.

Rivers:

The principal river of the London Basin is the Thames. It rises in the Cotswold Hills lying in the west and enters the region through the Goring Gap, between White Horse and Chiltern Mountains.

Then the river flows eastward and drains into the Dover strait. Many hill torrents have joined the Thames river, such as Lea and Roding from the north; Wey and Moly from the south.

Climate:

The climatic type of London Basin is popularly known as the ‘West coast maritime climate’ or ‘British type of climate’. In general, it has warm summers (17°C) and cold winters (4°C). Moist and cool climate prevails in this region throughout the year.

Rainfall is basically cyclonic with a winter maximum. It ranges from 75 cm on the crest of the North Downs to 60 cm on the Thames side. Snowfall occurs in winter.

Soils:

Once the London Basin was covered by a shallow sea where sediments like the ‘London clay’ were deposited about 70 million years ago.

Later when the basin was raised above the sea, patches of sand called ‘Bagshot Sand’ covered this clay in some places. At the margins of Chalk hills was deposited a pebbly and sandy soil called ‘Woolwich Sand’.

Natural Vegetation:

Owing to dense settlement, the growth of industries, and urban centers the original natural forests have been destroyed. Only on the highlands, do coniferous trees like oak, pine, and beech grow. Due to little rainfall, there are some grasslands in these basins.

 

 Economic Environment Of London Basin

Agriculture:

As the London Basin is very densely populated and highly industrialized, agriculture is restricted only to a small extent. To fulfill the local demand, advanced, mechanized mixed farming is practiced in some parts of this region. Varied crops are cultivated on small farms.

Vegetables i.e. potatoes, turnips, carrots, cauliflowers, cabbages, tomatoes, fruits, and flowers are produced and which are sent by trucks to the cities.

So this type of farming is also called ‘Truck farming’. Some cereals like wheat, barley oats, etc. are also produced in the north and west of the London Basin.

Animal Husbandry and Poultry Farming:

On the pastures found in the Chiltern and Downs Highlands and slopes of the mountains cattle and sheep are easily reared. Chicken, turkey, etc. are supplied from poultry farms.

Thus sufficient milk and milk products (butter, cheese, etc.), meat, and wool are also produced here. In the dairy industry, the region is quite developed.

Fishing:

Fishing is also practiced in this region.

Transportation System:

There is a good network of modern roadways, railways, and waterways. London basin is an important center of International air routes. There are five airports, such as Heathrow, Foulnes, Stansted, Black bush, and Croydon.

Heathrow is one of the busiest airports in the world. The underground and overground railway is very developed in London. London is an important river port also.

Minerals:

Other than some limestone and sand, there is no other mineral in this region.

Industries:

The London Basin is one of the most industrialized regions of the world. It is the principal industrial and trading center of the United Kingdom.

After the ‘Industrial Revolution’, rapid industrialization has taken place here. The following factors are responsible for such tremendous development in industry and trade in London Basin.

  1. Abundant Supply of Raw materials: The abundant supply of raw materials from its overseas colonies is responsible for the industrial development of this region.
  2. Nearness to the London Port: Being located at the center of the region, the port of London helps in the easy import of raw materials and export of finished goods.
  3. Developed Communication/Transportation System: Railways and roadways meet at London country. The benefit of good communication has naturally developed industry and trade in London.
  4. Skilled and Experienced Labourers: The dense London Basin has numerous cheap labors who have been skilled, experienced, and related to industry over a long period of time.
  5. Administrative Facilities: London is the main administrative headquarters of U.K.. has naturally more importance in the development of industry and trade.
  6. Availability of Electricity/Power Resource: Sufficient supply of power resources or electricity helps to develop industries in this region.
  7. Dense Population /Market Facilities: Dense population of the London Basin helps to supply sufficient cheap labor and it also increases the local demand for industrial goods which helps to develop a marketing system and economic prosperity.
  8. Advancement in Science and Technology: Applying modern techniques and machinery, quality and productivity has been increased.
  9. Easy availability of capital: London is a famous banking center. Therefore for the development of industry and trade the required capital and economic cooperation is easy. available.
  10. Nearness to the Industrially-Developed Countries: Across the Thames estuary on the other side of the ‘Strait of Dover lies the industrially developed countries of Germany, France, Netherlands, etc. of Europe. This developed economic environment sufficiently helps in the development of industry and trade in the region.

 

Industries And Industrial Centres Of London Basin

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Industrial Centres Of London Basin

 

Population and Settlement:

Due to its economic prosperity, London Basin has become a densely populated area. It is the most densely populated region of the U.K. with more than 1.25 crore people.

Numerous people live here because of developed communication, growth of agriculture and industry, and attraction of the capital.

 

Major Cities

1. London:

London is the capital of England, as well as the United Kingdom, and the leading city of the British Commonwealth and Empire. London is not only the largest city in this region but also the main city and port of the whole of U. K.

It is the third largest city in Europe after Paris and Moscow. It is an industrial and trade center. It is an important international airport center also.

Though London is a river port yet it is famous as an Entreport, as it imports materials which it again exports. For example, After importing tea, coffee, spices, etc: from various countries, it processes them and then exports them to different countries in Europe and other continents.

Many tourist places lie in London. Near London lies the famous Greenwich Observatory in the suburbs of Greenwich, over which extends the meridian of 0° longitude or the Prime Meridian. London is the most cosmopolitan city in the world.

2. Reading :

Reading is located at the confluence of the Thames and the Kennet is an industrial town. Engineering, biscuit, textile, etc. factories are located here.

3. New Bury:

It is located on the banks of the Kennet river. It is a busy market center. It is also famous for engineering, flour milling, and cotton textile factory.

4. Others:

Other important towns include Croydon, Chelmsford, Chatham, Slough, St. Alban, and Rochester.

 

Chapter 11 Continent Of Europe Polder Land

Introduction:

The term ‘Polder land’ is derived from the word ‘Polder’ which means reclaimed from under the sea’. So Polder land is actually low land that has been reclaimed from the shallow submerged lands of river marshes or the sea and is surrounded by dykes.

Polder land:

In the Netherlands, an area that has been reclaimed from the Zuider Zee (formerly, a landlocked inlet of the North Sea) and has been surrounded by the dykes to protect it from the seawater is called ‘Polder land’.

It is drained by pumping the water into canals and has made gradually very much fertile for agriculture.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Polder Land

 

Location of Polder Land:

The Polderlands latitudinally extend roughly between 51° N latitudes in the south and 54°N latitudes in the north and longitudinally between 3°E longitude in the west and 7°E longitude in the east.

The boundary of Polder land:

The Polder lands are bordered on the north and west by the North Sea, on the south and southwest by Belgium, and on the east and southeast by the remaining parts of the Netherlands.

Area and Extension:

The Polder lands cover about 16,700 sq. km and made up around 30% of Holland (meaning ‘the lowlands’) or the Netherlands. Nearly 70% of the Polder lands lie below sea level.

How a Polder land comes into being?

The reclamation of Polder lands started in the Netherlands, in ‘the eleventh century. Then the reclaiming process of Polder land was primitive. It has been modernized with the advancement of technology.

There are more than three thousand Polders in the Netherlands. Among these, Zuider Zee is the largest. Most modern and important projects on reclaiming polders are-

  1. Zuider Zee Project and
  2. Zeeland Project.

 

1.Zuider Zee Project was started in 1918. A dyke has been made to form a lake called Ijsselmeer from which lands have been reclaimed at different stages such as-

  1. North-west Polder; It was in 1st phase and completed 1927,
  2. North-East Polder (1942),
  3. East Polder (1954),
  4. West Polder(1980),
  5. South Polder (1980) etc.

2. Zeeland Project is located in the southern part of the Netherlands.

The main stage of reclamation of marshy land or parts of shallow seas is to seal the area with concrete dykes on all sides. Inside the circular dykes, there are rings of canals to drain the water.

After that musky water is pumped into the enclosure. As the sediment settled down, the water is pumped out by windmills (now mainly electricity operated).

Thereafter, the alluvium dries up and then the land is left to become out salt-free for a few days. After that, the land is used to cultivate different grasses such as hey, clover, alfalfa, etc. for fodder.

When the land becomes salt-free and favorable for cultivation different crops and flowers are cultivated.

 

WBBSE Solutions For Class 7 Geography Chapter 11 Continent Of Europe Wind Mill In Poldar Land(Netherlands)

 

Physical Environment Of Polder Land

Physiographic Characteristics:

The entire region is not only flat but also very low and mostly lies below sea level. Some parts of this region are located about 7 to 10 feet below sea level. If stagnation of rainwater occurs, it is pumped out to the draining canals. Most of the areas of this region are covered with marine clays.

Rivers of Polder land:

The Rhine (Principal river) and its distributaries such as the Waal (Val), Lek, Maas, and the East and West Schelde are the main rivers of Polder lands. All these rivers form deltas as they enter the North Sea. The Ijssel, another distributary flows into the Ijsselmeer.

The climate of Polder land:

Polder land is located in the cool temperate climatic region, but the climate is moderate because of the warm North Atlantic Drift. The average winter temperature is 3°C and the average summer temperature is 16°C. In the interior, summers are slightly warmer and winters are slightly colder.

Here the south-westerlies bring rainfall throughout the year. The average annual rainfall is around 75 cm with a winter maximum.

Soils of Polder land:

Alluvial soils are found along the banks of rivers. Most of the soils of Polder lands are saline clay.

Natural Vegetation of Polder land:

In this man-made land, there is simply no natural vegetation. The coastal dunes are planted with sand-binding grasses, reeds, and pines. Here trees like oak, birch, and grasslands are very common.

 

Economic Environment Of Polder Land

Agriculture:

The Polder lands are the richest agricultural regions of the Netherlands. With a view to decreasing the salinity of soil in the new polders, grasses like hay, clover, alfalfa, etc. are cultivated. These nutritious grasses are used as fodder.

In the old salt-free Polder lands different crops such as wheat, barley, eat, potato, mustard, and flax as well as strawberries and other fruits are cultivated. Farmers mainly practice ‘mixed farming’, where crop cultivation and cattle rearing are practiced under the same farm.

Here in the vast rolling tracts, different colorful flowers such as Tulips, Cosmos, Gladiuli, etc. are grown. Moreover, in the cold regions with less sunshine, vegetables and also flowers are grown, in ‘Green Houses’.

Livestock Raising:

Moderate temperature, year-round rainfall, and clayey soil are more suitable for grass than to crop farming. So, pasture dominates. Cattle are reared on rich pastures where hay, clover, and alfalfa grew abundantly.

Thus dairy farming is the keystone of Dutch activities and it provides butter and cheese for which the Netherlands is internationally famous.

Fishing:

Fishing is also important in the new Polder lands. Ijsselmeer (A lake, North section of former Zuider Zee which receives river vessels) has freshwater fisheries while shrimp fishing and cultivation of oysters and mussels are important in the Zeeland.

Mineral Resource:

The region is not so rich in mineral resources. The principal mineral of Polder land is natural gas. At Groningen, there is a large reserve of natural gas. It is one of the largest gas fields in the world. Some mineral oil is available at the Hague.

Industries:

Polder land is famous for its industries-Iron and steel, Petro-chemical, electronic and electrical goods (Phillips Company), ship-building, dairy, food-processing, cotton-textile, paper, leather, and perfumery or cosmetics industries have developed here.

Important industrial centres are Amsterdam, Rotterdam, Groningen, The Hague, Harlem, Leven, Ijmuiden, Leiden, Flashing etc.. Amsterdam is world-famous for its diamond cutting and polishing.

Transportation Sysem:

The transportation system in Polder land is well-developed. It has an excellent network of modern roadways and railways. Rivers and canals provide easy means .of communication.

The circular dykes are also used for transporting the estuary of river Lek, the largest port of the region, and Amsterdam transportation. Rotterdam, located at the est port of the region, Amsterdam is also famous as a port.

Population:

Polder land is densely populated because of its developed transportation system, advanced agricultural and industrial economy, and most modern way of livelihood.

 

Major Cities Of Polder Land

Amsterdam:

Amsterdam is the principal and capital city of the Netherlands. It is also an important port and industrial center. It is famous for electronic goods, shipbuilding, cigarette and cigar making, and diamond cutting.

It is popularly known as ‘Venice of the North’ because of its navigation and scenic beauty.

Rotterdam:

This is the busiest port in the world and an important town in the Netherlands. It is also known as ‘Europort’ as most of the European trade is carried through this port.

The Hague:

The Hague is the seat of the Parliament and of the ‘International Court of Justice’.

Others:

Other important cities are Eindhoven, Groningen, and Leiden.

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable Exercise 1.2

Ganit Prakash Class 10 Solutions In English

Chapter 1 Quadratic Equations In One Variable Exercise 1.2

Question 1: In each of the following cases, let us justify & write whether the given values are the roots of the given quadratic equation:

1. x2+x+1=0

Solution:  f(X) = x2+x+1=0

When x = 1 ;

(1)2+1+1=1+1+1 = 3

Again when x = -1 ;

(-1)2+1(-1)+1=1-1+1 = 1

(1) & (-1) are not the roots of the given equation.

Read and Learn More WBBSE Solutions For Class 10 Maths

  2. 8x2+7x=0

Solution: f(X) = 8x2+7x=0

When x = 0    

8(0) +7(0) = 0

When x = -2   

8(-2)2+7(-2) = 32-14= 18

0 & (-2) are not the roots of the given equation.

Wbbse Maths Class 10 Chapter 1 Exercise 1.2

3. x +1/x =13/6

 

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 1

5/6 & 4/3 are not the roots of the given equation.

4. x2– √3x-6=0

Solution: f(X) = x2– √3x-6=0

When x = – √3    

(√3)2-√3(-√3)-6=3+3-6 = 0

&  When x = 2√3,        

(2√3)2-√3 (2√3)-6=12-6-6 = 0

(√3) & (2√3). are the roots of the given equation.

Wbbse Maths Class 10 Chapter 1 Exercise 1.2

Question 2:
1. Let us calculate and write the value of k for which 2/3 will be a root the quadratic equation 7x2 + kx – 3=0.

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 2

 

2. Let us calculate and write the value of k for which -a will be a root of the quadratic equation x2 + 3ax + k = 0.

Solution: x2 + 3ax + k = 0

As (-a) is the root of the equation

x2 + 3ax + k = 0

⇒  (-a)2 + 3a(-a) + k = 0

⇒ +a2-3a2 + k = 0

⇒ -2a2+ k = 0

k =  2a2  Solution

 

3. If 2/3 and -3 are the two roots of the quadratic equation ax2 + 7x + b = 0, then Let me calculate the values of a and b.

 

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 3

Ganit Prakash Class 10 Solutions In English

Question 4: Let us solve

1. 3y2-20 160 – 2y2

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 26

Wbbse Maths Class 10 Chapter 1 Exercise 1.2

2. (2x+1)2 + (x + 1)2 = 6x + 47

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 5

3. (x-7) (x-9) = 195

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 27

Maths WBBSE Class 10 Solutions

4. 3x-24/x=x/3, x ≠ 0

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 7

Maths WBBSE Class 10 Solutions

5. x/3+3/x=15/x, x ≠ 0

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 8

6. 10x-1/x= 3, x ≠ 0

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 9

7. 2/x2-5/x+2=0 , x ≠ 0

Wbbse Maths Class 10 Chapter 1 Exercise 1.2

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 10

(8) x-2/x+2 + 6(x-2)/x-6 = 1 , x ≠ -2 , 6

WBBSE Solution Class 10 Maths

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 11

9. 1/x-3 – 1/x+5 = 1/6 , x ≠ 3,-5

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 12

10. x/x+1 + x+1/x = 2 1/12  , x ≠ 0 , -1

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 13

11. ax+b/a+bx = cx+d/c+dx [x≠ b, c≠ d] , x≠ a/b , -c/d

WBBSE Maths Class 10

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 14

12. (2x+1)+3/2x+1 = 4 , x≠ -1/2

Wbbse Class 10 Maths Chapter 1 Exercise 1.2 Solutions

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 15

13. x+1/2 + 2/x+1 = x+1/3 + 3/x+1 – 5/6 , x≠ -1

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 16

14. 12x+17/3x+1 – 2x+15/x+7 = 3 1/5 , x≠ 1/3 , -7

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 17

15. x+3/x-3 + 6(x-3)/x+3 = 5 , x≠ 3 , -3

Wbbse Class 10 Maths Chapter 1 Exercise 1.2 Solutions

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 18

16. 1/a+b+x = 1/a + 1/b + 1/x , x≠ 0 , -(a+b)

WBBSE Maths Class 10

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 19

17. (x+a/x-a)2 – 5(x+a/x-a) + 6 = 0 , x≠ a

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 20

18. 1/x – 1/x+b = 1/a – 1/a+b , x ≠ 0 , -b

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 21

19. 1/(x-1)(x-2) – 1/(x-2)(x-3) + 1/(x-3)(x-4) = 1/6 , x≠ 1,2,3,4

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 22

20. a/x-a + b/x-b = 2c/x-c , x≠ a b,c

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 23

Class 10 Math Solution WBBSE In English

21. x2-(√3+2)x+2√3-0

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 24

Application 1: The unit digit of a two-digit number exceeds the tens digit by 6 and the product of two digits is less by 12 than the number, let us write by calculating the possible unit digit of the two-digit number.

WBBSE Solutions For Class 10 Maths Chapter 1 Quadratic Equations In One Variable 25

WBBSE Notes For Class 8 Middle School Geography

WBBSE Notes For 8 Class Middle School Geography