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OpenStudy (anonymous):
All of the following separate geologic time into eras, periods, and epochs except for A: major extinctions B: periods of biological diversity C: changes in the earth's geology D: extinction of one type of species
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OpenStudy (anonymous):
Hi cheyennelynn1996 the answer is A because an era is a period of time a major extinction can happen in an instant though it id not an era
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