1. 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Biodiversity Threats to Biodiversity Conserving Biodiversity Human Impacts Actual Test Questions

2. When the last member of the species dies

3. Extinction

4. Thee number of different species in a biological community

5. Species diversity

6. Maintaining ______ has a direct economic value to humans

7. Biodiversity.

8. Why is it important to maintain biodiversity for medical reasons?

9. Humans rely on plants for medicine

10. The process of transferring genes is known as

11. Genetic Engineering

12. An event in which a large amount of all living species become extinct in a relatively short time

13. Mass extinction

14. All the materials and organisms found in the biosphere

15. Natural resources

16. The excessive use of species that have economic value is known as

17. Overexploitation

18. The gradual process of species becoming extinct is known as

19. Background extinction

20. Occurs when fertilizers, animal waste, sewage, or other substances rich in phosphorus flow in waterways causing extensive algae growth

21. Eutrophication

22. Resources that are replaced faster than they are consumed are known as

23. Renewable resources

24. Using resources at a rate at which they can be replaced or recycled is known as

25. Sustainable use

26. Species that are found only in specific geographic area

27. Endemic species

28. The use of living organisms such as prokaryotes, fungi, or plants to detoxify a polluted are is known as

29. Bioremediation

30. Adding natural predators to a degraded ecosystem is known as

31. Biological augmentation

32. Throughout history, humans have lived primarily as what types of groups?

33. Hunters/gatherers

34. What layer of the atmosphere contains the ozone layer

35. Stratosphere

36. What specific atom is the main cause of the greenhouse effect

37. CO2

38. The two different sources of water pollution are known as

39. Point and Non-point

40. The accumulation of chemicals in organisms at higher trophic levels of a food chain is known as what

41. Biomagnification

42. True or false: the best way to restore a damaged ecosystem is to introduce predators to control the population of endemic species

43. False

44. The cheetah population was around 100,000 in 1900. Today, fewer than 12,000 cheetahs remain. What type of natural recources are cheetahs considered?

45. Nonrenewable

46. The variety of ecosystems that are present in the biosphere is called

47. Ecosystem Diversity

48. The different environmental conditions that occur along the boundaries of an ecosystem are described by ecologists as ________

49. Edge Effects

50. Why is sandstone classified as a nonrenewable resource

51. Sandstone takes thousands of years to form