37. Plant Sensation and Response
Tropisms and Hormones
2:22 minutes
Problem 4
Textbook Question
Textbook QuestionIn 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 … auxin b. gibberellin … abscisic acid c. cytokinin … abscisic acid d. auxin … ethylene
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