BIOLOGY
BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 25, Problem 5U

Fossil data indicate that

a. life originated 4 BYA.

b. life may have originated 3.5 BYA, but definitely by 3.2 BYA.

c. the Cambrian explosion led to the origin of life.

d. plants played an important role in causing glaciation.

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