Answer
B.
Work Step by Step
A is wrong since whales do use their forelimbs for swimming, and the rate of mutation in C is not necessarily related to structural features of a limb. D can be excluded since whales are, indeed, mammals.
Campbell Biology (11th Edition)
by Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Published by
Pearson
ISBN 10:
0-13409-341-0
ISBN 13:
978-0-13409-341-3
Chapter 22 - Test Your Understanding - Level 2 - Application/Analysis - Page 483: 4
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