Biology (11th Edition)

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

Chapter 21 - The Evidence for Evolution - Review Questions - Understand: 7



Work Step by Step

Ancestral traits can often be seen in embryonic development (B.), even if lost in adults. A. is simply untrue--the womb is warm and nuturing, and C. is incorrect because it does not explain why hair would be seen at this stage. D. can be excluded since the hair later disappears, while D. says that this fur would just be developed ahead of time.
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