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 - Synthesize: 1


Evolution requires phenotypic variation, due to genetic differences, which leads to differential survival and contribution to the next generation.

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This question is simply answered by summarizing the the points made in the first part of the chapter.
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