Biology Practice test part – 4 By studybizz

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1. Which among the following is a Mollusc?

a) Cuttle fish

b) Silver fish

c) Dog fish

d) None of the above

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2. About the total number of species present on earth, a more conservative and scientifically sound estimate made by

a) Robert May

b) Robert Costanza

c) Alexander Von Humboldt

d) Both 1&2

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3. Deserts, rain forests, mangroves , coral reefs, wetlands, estuaries and alpine meadows can be employed to describe the

a) Genetic diversity

b) Species diversity

c) Ecological diversity

d) All of the above

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4. The genetic variation show by auwolfia might be in terms of

a) Potency of reserpine

b) Concentration of reserpine

c) Fragrance of reserpine

d) Both 1&2

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5. Rauwolfia vomitoria is a medicinal plant.

a) Rauwolfia vomitoria is a medicinal plant.

b) Rauwolfia vomitoria is growing in different Himalayan ranges

c) India has more than 50,000 genetically different strains of rice

d) In India 10,000 varieties of mango are found

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6. What is common to the following plants: Nepenthes, Psilotum, Rauwolfia & Aconitum?

a) All are ornamental plants

b) All are phylogenic link species

c) All are prone to over exploitation

d) All are exclusively present in the Eastern Himalayas

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7. Match the animals given in columns A with their location in column B

Column A Column B

a) Dodo 1) Africa
b) Quagga 2) Russia
c) Thylacine 3) Mauritius
d) Stellar’s sea cow 4) Australia

Choose the correct match from the following

a) a-1,c- 2,b-3,d- 4

b) d-1,c- 2,a-3,b- 4

c) c-1,a- 2,b-3,d- 4

d) c-1,a- 2,d-3,b- 4

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8. Which of the following is not a cause for loss of biodiversity?

a) Destruction of habitat

b) Invasion by alien species

c) Keeping animals in zoological parks

d) Over-exploitation of natural resources

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9. Which is mainly responsible for extinction of wildlife?

a) Hunting for flesh

b) Destruction of habitats

c) Pollution of air &water

d) All the above

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10. According to IUCN Red List , what is the status of Red Panda(Ailurus fulgens)?

a) Critically endangered

b) Endangered species

c) Vulnerable species

d) Extinct species

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11. The organization which has published ‘Red Data Book” is

a) International Union for Conservation of Nature and Natural Resource

b) National Environmental Engineering Research Institute

c) National Wildlife Action Plan

d) Convention on International Trade in Endangered Species of Wild Fauna & Flora

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12. Which of the following is referred as “Evil Quartet” With reference to loss of biodiversity?

a) Species richness, extinctions, deforestation, erosion

b) Habitat loss and fragmentation, over-exploitation, alien species invasion, co-extinction

c) Overexploitation, grazing decomposition, extinction

d) Habitat destruction, co-extinction, deforestation, species richness

e) Grazing , erosion, deforestation, species richness

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13. The Amazon rain forest harbouring probable millions of species is being cut and cleared for

a) Cultivating soya beans

b) Conservation to grasslands for raising beef cattle

c) Playing cricket/ IPL

d) Both 1 & 2

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14. Match the columns I & II and choose the correct combination from the options given

Column I Column II

Taxonomic group Threat of Extinction

a) Birds 1) 12 per cent
b) Amphibians 2) 23 percent
c) Mammals 3) 31 percent
d) Gymnosperms 4) 32 percent

a) a-1,b- 2,c-3,d- 4

b) b-1,a- 2,c-4,d- 3

c) a-1,c- 2,b-4,d- 3

d) a-1,b- 3,c-2,d- 4

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15. When a large habitats are broken up into small fragments due to various human activities, which of following organisms are badly affected

a) Mammals requiring large territories

b) birds requiring large territories

c) Certain animals with migratory habits

d) All of the above

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16. The loss of biodiversity in a regionmay lead to

a) Decline in plant production

b) Lowered resistance to environmental perturbations such as drought

c) Increased variability in certain ecosystem processes such as plant productivity, water use and pest and disease cycle

d) All of the above

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17. In a comparative analogy between the airplane and ecosystem ( the ‘rivet popper hypothesis) used by Stanford ecologist Paul Ehrlich, find out the correct matching

Column I Column II

a) Rivets 1) Ecosystem
b) Airplane 2) Species
c) Popping a rivet 3) Key species
d) Rivets on the wings ecosystem

4) Proper functioning of

e) Flight safety

5) A species to become extinct

a) a-1,b- 2,c-3,d- 4,e-5

b) a-2,b- 1,c-4,d- 5,e-3

c) a-2,b- 1,c-5,d- 4,e-3

d) a-2,b- 1,c-5,d- 3,e-4

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18. The rich biodiversity of the earth is

a) Essential for ecosystem health

b) Imperative for the very survival of the human race on this planet

c) Not essential for ecosystem health

d) Both 1& 2

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19. David Tilman’s long-term ecosystem experiments using outdoor plots showed that

a) Increased diversity contributed to lower productivity

b) Increased diversity contributed to higher productivity

c) Increased diversity have no impact on productivity

d) Increased diversity have unpredictable impact on productivity

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20. What does the mean of stability in context to a biological community?

a) A stable community should not show too much variation in productivity from year to year

b) A stable community must be either resistant or resilience to occasional disturbances ( natural or man-made)

c) A stable community must be resistant to invasion by alien species

d) All of the above

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21. In the plot of the species –area relationship the x & y axis represents xaxis y-axis

a) Species richness Area

b) Area Species richness

c) Slope of the line Intercept

d) Intercept Slope of the line

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22. The species –area relationship on a logarithmic scale (log-log scale) is

a) Rectangular parabola

b) Rectangular hyperbola

c) Straight line/ linear

d) Sigmoid

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23. Match the columns I & II and choose the correct combination from the options given

Column I

Organism

a) Plants
b) Invertebrates
c) Vertebrates
d) Insects species waiting to be discovered

Column II

Number of species in Amazon rain forest

1) 1, 25,000

2) 2,00,000

3) 20,00, 000

4) 40,000

5) 5532

a) d-1,b- 2,c-3,e- 4

b) b-1,c- 2,a-3,d- 4

c) d-1,a- 2,e-3,b- 4

d) d-1,a- 2,e-3,c- 4

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24. The relation between species richness and area for a wide variety of taxa (angiosperm plants, birds, bats, freshwater fishes) turns out be a

a) Rectangular parabola

b) Rectangular hyperbola

c) Straight line / linear

d) Sigmoid

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25. The observation of the species – area relationship was given by Humboldt after his pioneering and extensive explorations in the wilderness of

a) South American jungles

b) North American jungles

c) South African jungles

d) East African jungles

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Biology Practice test part – 4 By studybizz

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