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Class 12 Biology Chapter 15 Biodiversity And Conservation Quiz 4 (60 MCQs)

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1. The fact that organisms are adapted to survive in particular environments helps to explain why
2. A declining population of one species can affect an entire what???
3. Which of the following is not an invasive species
4. Differences in DNA among individuals refers to what?
5. Which of the following diversities refers to variety as well as number of species in a given area?
6. What type of species appear first, when the ground is simply bare rock, or bare soil after a disturbance?
7. Which of the following is not an example of in situ biodiversity conservation?
8. Which of the following phyla has largest number of species?
9. Which of the following forest is known as the lungs of the planet Earth
10. What are ecosystem services and why are they important?
11. These biomes are open, fairly flat areas that cover one fourth of the world's land. They can be found on every continent except Antarctica
12. What are three things that create biodiversity?
13. What is the term for a habitat being broken into smaller, separated pieces?
14. The history convention on biological diversity held in Rio de janerio in 1992 is known as
15. A common type of succession that occurs where an event such as a forest fire has occurred, or a farmer's field has been abandoned is called
16. What threat could Burmese pythons introduced in the Everglades pose?
17. Pollen grains can be stored for several years in liquid nitrogen having a temperature of
18. It is defined as the number of different species present in anecosystem and the relative abundance of each of those species.
19. What is a group of spatially separated populations of the same species which interact at some level?
20. Programs that breed animals in captivity then release them to the wild are called .....
21. This type of diversity refers to the variety of organisms present in a given area.
22. Which applies to this environmental problem:Invasive carp are fast-growing, aggressive, and adaptable fish that are outcompeting native fish species for food and habitat in much of the mid-section of the United States.
23. The most diverse ecosystems on Earth are the .....
24. What is Biodiversity referred to as?
25. Human-wildlife conflict occurs primarily due to:
26. Most of the living species known to science are
27. The pattern of biodiversity is affected by
28. According to the concept of species area relations-
29. What actions decrease biodiversity?
30. What is the definition of Endemic Species?
31. What is the purpose of a national park?
32. If we analyse the species-area relationships among ver large areas like the entire continents, then slope of line becomes much steeper in the range of
33. What are some examples of conservation strategies?
34. What percentage of all bird species in the world are currently facing the threat of extinction?
35. ..... means using resources at a rate that they can be replaced or restored.
36. Name an example of an endangered species and its habitat.
37. What is the total number of different species found in an ecosystem?
38. This helps the ecosystem sustainable
39. What is the danger of losing genetic diversity?
40. True or False:Monoculture means only one type of crop is and raised. This is good for biodiversity because when the environment changes, some of that crop will be able to survive.
41. Which of the following would not be illegal under the Endangered Species Act?
42. This type of diversity refers to the variety of habitats, communities, and ecological processes within and between ecosystems.
43. Alexander von humboldt described for the first time
44. Around 40% of freshwater fishes of which region have note been classified yet?
45. Name the four major causes of biodiversity losses as described in the passage.
46. According to biologists, what percentage of species have become or are expected to become extinct between 1900 and 2100?
47. ..... ecosystems are affected by environmental change but can bounce back and regain function.
48. Which threat of biodiversity is the root cause of all other threats to biodiversity?
49. When an animal becomes extinct, that means
50. What is the variety of genes present?
51. Increasing concentration of toxic substances in organisms as trophic levels increase
52. India has two hotspots North East Himalayas and Western Ghats which are rich in:
53. Variety of habitats and communities within ecosystems.
54. ..... is the basic unit of classification and a taxonomic rank
55. The distribution of species diversity on earth may be best described as
56. The hydroponics lab (like the one in the back of our classroom) is good because it prevents habitat destruction.
57. What is a nature reserve?
58. Explanations for how animals achieved greater diversification include:
59. Which is an example of genetic diversity within a rain forest?
60. Which of the following is a major threat to biodiversity caused by human activities?
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