Campbell Biology (10th Edition)

Published by Pearson
ISBN 10: 0321775651
ISBN 13: 978-0-32177-565-8

Chapter 25 - Test Your Understanding - Level 1 - Knowledge/Comprehension - Page 544: 2

Answer

A.

Work Step by Step

B and C do not describe taking advantage of the presence of oxygen but rather persistence or survival steps taken. D is wrong since it relates to the source of oxygen early in Earth's history but not to taking advantage of its presence.
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