Ecology, Ecosystems, and the Environment

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Chapter 19 Ecology, Ecosystems, and the Environment: ------------------------------------------------- Are human activities affecting the global environment? 1. The flow of energy in an ecosystem a. decreases by 90% at each trophic level. b. is a discrete amount transferred without change. c. transfers from plants to carnivores to herbivores. d. is wasted by the decomposers. e. all of the above Ans: a Link To: Ecology and Ecosystems Difficulty Level: Easy 2. Which of the following initiated the law of unintended consequences at Lake Victoria in Africa? a. clear cutting of old growth pine trees b. building jetties on the Lake Victoria shore c. introducing the Nile perch d. growing algae for a aquaculture e. constructing lake-front apartments Ans: c Link To: The Law of Unintended Consequences Difficulty Level: Easy 3. Urban landfills use procedures that a. increase the decay rate for most trash. b. accelerate the process by which aluminum is recycled. c. decrease the decomposition rate for newspapers. d. increase the number of aerobic bacteria. e. make it cost effective to recycle glass. Ans: c Link To: Threats to the Global Ecosystem and Environment Difficulty Level: Easy 4. A national recycling program is inhibited by a. lack of a market for some recycled products. b. the fact that each type of trash requires a unique chemical process to be recycled. c. the sheer volume of trash needing to be processed. d. America's "use it and lose it" attitude. e. all of the above Ans: e Link To: Threats to the Global Ecosystem and Environment Difficulty Level: Easy 5. Which term refers to the particular way an organism obtains energy? a. ecosystem b. environment c. ecology d. ecological niche e. habitat Ans: d Link To: The Law of Unintended Consequences Difficulty Level: Easy 6. Which statement about an ecosystem is

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