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The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual processes or _____. A.
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The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual processes or _____.
A.)a large comet or asteroid striking Earth
B.)widespread reproductive isolation
C.)lightning strikes
D.)rapid continental drift
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Biology
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2021-07-25T19:07:02+00:00
2021-07-25T19:07:02+00:00 1 Answers
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A:a large comet or asteroid striking earth