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Present extinction rates are estimated to be how much faster than in pre-human times?
A10 to 20 times
B100 to 1,000 times
C5,000 to 9,000 times
DAbout the same
Answer & Solution
Correct answer: B. 100 to 1,000 times
Human activities have pushed current extinction rates to 100 to 1,000 times pre-human rates.
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