A 1/1,000,000 species per year extinction rate, which is the estimated average rate of extinction in the history of life on the earth, is called ____ extinction.
A. background
B. local
C. ecological
D. biological
E. total
Answer: A
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Many biologists and wildlife conservationists believe that the best way to keep from hastening the extinction of wild species through human activities is to protect threatened habitats and ecosystem services. This is referred to as ____.
A. the wilderness approach B. ecosystem rehabilitation C. environmental conservation D. the ecosystems approach E. biodiversity consideration
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