Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1259188132
ISBN 13: 978-1-25918-813-8

Chapter 56 - Community Ecology - Review Questions - Apply - Page 1208: 4

Answer

D.

Work Step by Step

A. is wrong since defenses against parasites do arise, and B. is incorrect because this can lead to an evolutionary "arms race." C. can be excluded since parasites can greatly decrease the numbers of species which they parasitize. Since A.-C. are wrong, D. is the best choice.
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