Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 25 - Evolution of Development - Review Questions - Apply: 3

Answer

D.

Work Step by Step

Heavy armor is too costly in freshwater (C.) but highly adaptive in salt water due to predators (B.), so D. is correct. A. is wrong because that statement is irrelevant to questions of selection--selection would operate no matter how often the allele arose.
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