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.).
Biology (11th Edition)
by Raven, Peter; Johnson, George; Mason, Kenneth; Losos, Jonathan; Singer, Susan
Published by
McGraw-Hill Education
ISBN 10:
1259188132
ISBN 13:
978-1-25918-813-8
Chapter 9 - Cell Communication - Review Questions - Apply - Page 185: 5
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