Biological Science (6th Edition)

Published by Benjamin Cummings
ISBN 10: 0321976495
ISBN 13: 978-0-32197-649-9

Chapter 23 - Evolutionary Processes - Review: 9

Answer

B.

Work Step by Step

Evolution can only work in the case of heritable traits, and environmental effects such as better health and better nutrition are not heritable. a. is wrong because a mere change over time is not evidence of evolution--the change must be heritable. d. is wrong because height is a heritable trait, but c. is incorrect because evolution in not necessarily involved just because a trait with a heritable component is involved.
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