Biologists conservatively estimate that the current extinction rate is ____________________ times the normal background extinction rate.
Correct Answer:
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Q73: _ is a mysterious disease that causes
Q74: Most failed species reintroduction occurs because of
Q75: It can be said that, of the
Q76: Scientists believe that human activities that cause
Q76: _ are environmental indicators because they live
Q77: The United States currently has about _
Q80: MATCHING
For the list of animals, select the
Q81: Select the human activity or program that
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