Campbell Biology: Concepts & Connections, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (8th Edition)
Campbell Biology: Concepts & Connections, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (8th Edition)
8th Edition
ISBN: 9780133909029
Author: Jane B. Reece, Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan
Publisher: PEARSON
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Chapter 33, Problem 4TYK

In autumn, the amount of _____ increases and the amount of _____ decreases in fruits and leaf stalks, causing a plant to drop fruit and leaves.

a. ethylene Á auxin

b. gibberellin Á abscisic acid

c. cytokinin Á abscisic acid

d. auxin Á ethylene

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