Approaches for preserving endangered species and ecosystems


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Approaches for preserving endangered species and ecosystems

  1. 1. Southern Luzon State University College of Arts and Sciences BS-Biology III Quiz 8 FINALS Name: _________________________________ Date: ____________ Score: _________ A. Multiple Choice. Write thecapitalletter of the correct answer before each number. (10 pts) 1.Which of the following would be considered an example ofbioremediation? A. adding nitrogen-fixing microorganisms to a degraded C. reconfiguring the channel of a river ecosystem to increase nitrogen availability B. using a bulldozer to regrade a strip mine D. adding seeds of a chromium accumulating plant to soil contaminated by chromium 2.One characteristic that distinguishes a population in an extinctionvortex from most other populations is that A. its habitat is fragmented. C. its genetic diversity is very low. B. it is a rare, top-level predator. D. it is not well adapted to edge conditions. 3. The discipline that applies ecological principles to returningdegraded ecosystems to more natural states. A. population viability analysis. C. conservation ecology. B. landscape ecology. D. restoration ecology. 4. What is the single greatest threat to biodiversity? A. habitat alteration, fragmentation, and destruction C. introduced species that compete with and more prey species become extinct B. disruption of trophic relationships as more prey D. overexploitation of commercially important on native species species 5. What are the three levels of biodiversity? A.genetic, species, biome C. molecular, species, biome B. genetic, population, ecosystem D. genetic, species, ecosystem 6. The declining population approach __________. A. emphasizes the environmental factors that caused a population’s decline. B. emphasizes smallness itself as an ultimate cause of a population’s extinction C. emphasizes the impact of the loss of genetic diversity in a population D. none of the above 7. A species that are considered likely to become endangered in the foreseeable future A.ecosystem services C. introduced species B. threatened species D. endangered species 8.A species that is “in danger of extinction throughout all or a significant portion of its range. A. threatened species C. introduced species B. ecosystem services D. endangered species 9. True or False. Small population conservation focuses on identifying species and population that are really small and tries to help boost their numbers in species diversity. 10.Biological communities can recover from many types of disturbances through a series of ____________ that occur during ecological succession. A. rapid regrowth. C. restoration mechanisms B. threatened species D. environmental requirements
  2. 2. Southern Luzon State University College of Arts and Sciences BS-Biology III B. Essay. Choose only two (2) questions and explain briefly. (5pts. Each) 1. When you think about your career interest, does conservation of biodiversity play any part? How might you connect your career interests to biodiversity protection? 2. Why does the reduced genetic diversity of small populations make them more vulnerable to extinction? 3. Which organism is more likely to become extinct, an endangered species or a threatened species? Explain your answer. 4. Extinction is natural and no species persists forever. This statement is true, but is it a reason to not protect biodiversity? Why? 5. How do bioremediation and biological augmentation differ? BONUS QUESTION: Give two examples of the animals presented in the video about the report.