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Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 11 (60 MCQs)

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1. According to May's global estimates, only ..... of the total species have been recorded so far.
2. What global phenomenon has caused some organisms to move toward the poles or to higher altitudes?
3. ..... is the number or variety of species in the world or in a particular region.
4. Which of the following is NOT a type of protected area mentioned in the passage? Choose the correct option.
5. The major cause of extinction is .....
6. Resources that are replaced by natural processes faster than they are consumed
7. Among the ecosystem services are control of floods and soil erosion. This is achieved by the biotic components of the ecosystem through:
8. Which of the following is not currently a major cause of species extinctions?
9. Sustainable use means using resources at a rate in which they can be replaced or recycled while preserving the long-term environmental health of the biosphere.
10. Which of the following represents diversity at ecosystem level?
11. This occurs on land that previously had no soil
12. What is a keystone species, and why is it important for maintaining biodiversity?
13. In India, we find mangoes with different flavours, colours, fibre content, sugar content and even shelf-life. The large variation is on account of
14. What is the effect of overharvesting marine species?
15. Which of the following is NOT a type of biodiversity?
16. An agreement regulating the trade of threatened or endangered species
17. The use of a oil-eating bacteria to clean up an oil spill way is an example of:
18. Describe a sustainable practice that can help conserve biodiversity.
19. Describe one method of habitat restoration.
20. An example of an aesthetic value of biodiversity would be:
21. What does preserving natural habitats help support?
22. Using resources at a rate in which they can be replacedor recycled while preserving the long-term environmental health of the biosphere.
23. Archaeological evidence shows that in case after case, a wave of ..... followed whenever humans arrived on islands and continents.
24. Bats participating in plant pollination is what type of ecosystem service?
25. A ..... is an area that supports an especially high number of endemic species, but is rapidly losing biodiversity.
26. Which place is kangaroos considered to be endemic
27. Because of the Endangered Species Act, the sale of protected animals or plants is
28. Which of the following resources can be considered renewable?
29. What is the correct hierarchy of taxonomic groups, from largest to smallest?
30. How do invasive species impact native ecosystems?
31. Which of the following is a focus of the CBC's Evidence Initiative?
32. The level of biodiversity that involves a variety of habitats and communities is
33. Exotic or invasive species leads to all of these problems except
34. What conservation strategy uses areas that connect fragmented habitats
35. According to Robert May, the global species diversity is estimated to be about ..... million.
36. True or False:Trees are important to humans because they help reduce CO$_{2}$ in the atmosphere.
37. Reintroducing the gray wolf in certain areas of the northwestern United States
38. What do we call plants that will grow back year after year without being replanted?
39. What biome contains the least amount of species biodiversity?
40. An organism that has an usually large effect on an ecosystem is called a(n)
41. The number of fungi species in the world is more than the combined total of the species of fishes, amphibians, reptiles and mammals.
42. Environmental factors do affect genetic diversity
43. Which of the following forests is known as the lungs of the planet Earth?
44. Within the phylum Chordata, which of the following describe that class that have hair on part of their body, and mammary glands that produce milk?
45. Diversity of genes within species is known as
46. The prevention of the topmost layer of the soil from erosion or prevention of reduced fertility caused by over usage, acidification, salinization, or other chemical soil contamination.
47. Sulfur and nitrogen compounds react with water andother substances in the air to form sulfuric acid andnitric acid.
48. Resources that are found on Earth in limited amounts
49. A non-native species transported to a new habitat
50. High biodiversity allows individual organisms to modify their body parts to adapt and survive in the environment.
51. All of the following describe habitat fragmentation, EXCEPT:
52. Which is the most endangered animal group?
53. The number of different species and the relative abundance of each species in a biological community
54. Deserts. rain forests. mangroves. coral reefs, wetlands, estuaries and alpine meadows can be employed to describe
55. What is a measure of how all of the individual organisms in an ecosystem are balanced between the different species?
56. What is the number one cause of species extinction today?
57. Which is a consequence of introducing high-yielding foreign plant varieties?
58. Species diversity ..... as one moves from equator to pole.
59. Which of the following is not associated with the process of subduction?
60. An endangered species is
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