Biology Practice test part – 4 By studybizz

1. Which among the following is a Mollusc?

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

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

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

5. Rauwolfia vomitoria is a medicinal plant.

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

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

Column A                        Column B

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

Choose the correct match from the following

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

9. Which is mainly responsible for extinction of wildlife?

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

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

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

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

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

Column I                                                                 Column II

Taxonomic group                                            Threat of Extinction

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

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

16. The loss of biodiversity in a regionmay lead to

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

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

4) Proper functioning of

1. e) Flight safety

5) A species to become extinct

18. The rich biodiversity of the earth is

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

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

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

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

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

Column I

Organism

1. a) Plants
2. b) Invertebrates
3. c) Vertebrates
4. 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

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

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