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    Biology A Guide
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    Exam 19: A Slow Unfolding: the History of Life on Earth
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    Sections of the Geologic Timescale Are Defined By
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Sections of the Geologic Timescale Are Defined By

Question 72

Question 72

Multiple Choice

Sections of the geologic timescale are defined by:


A) how close the rocks are to the surface of the earth.
B) whether the rocks are metamorphic or sedimentary.
C) the age of the rocks.
D) the kinds of fossils present.

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