Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 38, Problem 4TYU
Summary Introduction

Introduction: Plant hormones are chemical molecules produced by plants in extremely low concentration for regulating growth and development. There are five major hormones involved in the growth process. They are auxin, gibberellin, ethylene, abscisic acid, and cytokinin. Each of these hormones has their own functions at specific locations. The presence of these hormones in a definite amount is very essential for the normal growth and development of the plant.

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What are the effects brought by cytokinin in plants? Explain the partnerships between cytokinin with auxin and hormone mentioned in Question 3 a). (i) (ii) Write an account on interactions between gibberellins, indole acetic acid and abscisic acid in plant growth promotion and seed germination.
The hormone that helps plants respond to drought is (A) auxin. (B) abscisic acid. (C) cytokinin. (D) ethylene.
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