Answer
A.
Work Step by Step
Homologous structures come from a structure in a common ancestor, not just similar-looking ones (B.). How they function (C., D.,) does not affect their being homologous.
Biology (11th Edition)
by Raven, Peter; Johnson, George; Mason, Kenneth; Losos, Jonathan; Singer, Susan
Published by
McGraw-Hill Education
ISBN 10:
1259188132
ISBN 13:
978-1-25918-813-8
Chapter 21 - The Evidence for Evolution - Review Questions - Understand - Page 439: 4
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