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Environmental Science
Name __________________________________ Period __________ Date ________________
Chapter 10, Biodiversity–Reading Guide
Section 1 pgs. 259- 262
1. Which part of the planet has an extraordinary variety of species? _______________________
2. How many species are known to science? __________________________________
3. Naming describe the three levels of biodiversity. _1.__________________________________
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4. Why is the sea otter considered a keystone species? __________________________________
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5. Why are small and isolated populations less likely to survive the change in their ecosystem?
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6. What kind of organism are almost all antibiotics derived from? _________________________
7. What is the origin of Turbocurarine and what is its use? ______________________________
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9. Name three foods that came from North America, Central America, and South America.
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10. Give an example of why humans shouldn't depend on just a few varieties of food. ________
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11. Why is ecotourism important to some regions of the world? _________________________
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Section 2 pgs. 263-269
12. What is mass extinction? ______________________________________________________
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13. The percentage of species are expected to be extinct by 2100? _______________________
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14. What is considered the cause of the present extinctions? _____________________________
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15. What are three reasons species that are especially at risk may become extinct? ___________
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16. Compare and contrast an endangered species and a threatened species. _________________
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17. What are three major causes of extinctions today? __________________________________
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18. What is considered to be the major cause of extinctions today? ________________________
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19. How do exotic species threatened native species? ___________________________________
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20. What is an example of a species that was hunted to extinction? _______________________
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21. What was the substance nearly caused the extinction of bald eagles in the United States?
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22. Which type of organisms do ecologists use as indicators of biodiversity in an area?
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23. What percentage of the world species live in tropical rain forests? ____________________
24. What human activities are threatening coral reefs? __________________________________
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25. What is a biodiversity hotspot and where are they located? ___________________________
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26. Name three unique ecosystems found in the United States. __________________________
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27. What are two threats to the California Floristic Province? ____________________________
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Section 3 pgs. 270-275
28. What is a captive breeding program? ____________________________________________
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29. Why do germ plasm banks store germ plasm? __________________________________
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30. Why are zoos, wildlife parks, aquarium, and botanical Gardens considered living museums?
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31. What are some disadvantages of captive breeding programs? ________________________
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32. Why is preserving small plots of land for endangered species not an effective way of
protecting them? ______________________________________________________________
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33. What is the advantage of protecting entire ecosystems? _____________________________
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34. What is the purpose of the Endangered Species Act? _______________________________
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35. By 2002 how many plant and animal species were listed as endangered? _______________
36. What do Endangered Species Act recovery plans often include? ______________________
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37. A conservation plan that allows trade-offs between harm to the species and additional
conservation commitments is called a _______________________________________________
38. The IECN publishes red lists. What is a red lists? __________________________________
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39. The CITES treaty of 1989 was enacted for what purpose? ____________________________
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40. What is the Biodiversity Treaty? _______________________________________________
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41. Name three private conservation organizations. ____________________________________
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42. Why does species protection often come in conflict with human needs? _________________
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