Biology (11th Edition)

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

Chapter 9 - Cell Communication - Review Questions - Apply: 5

Answer

D.

Work Step by Step

D. is correct since all of these are true--basically, what choices A.-C. mean are that there is tremendous diversity at all levels of cell signalling, from receptors (A.) to subsequent steps in signalling (B. and C.).
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