Biology (11th Edition)

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

Chapter 39 - Plant Defense Responses - Review Questions - Apply: 6

Answer

A.

Work Step by Step

avr genes are what plant defenses recognize to allow them to fight diseases. B. is wrong since the avr gene needs to be recognized, and D. is wrong since evolution is not a process which occurs in one plant. C. is wrong since this would only happen once the avr gene was recognized, which the question says does not happen.
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