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 38.2, Problem 3LO
Summary Introduction

To describe: The early auxin experiments involving phototropism.

Introduction: Phototropism is the directional growth of plants toward a light stimulus. Phototropins are the blue-light receptors that control the photosynthetic efficacy of plants located at the shoot tips that help the plants in this regard. Light source is necessary for a plant body to carry out many of its major functions.

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Explain the concept of phototropism and how auxin is involve in this process. Give some examples.
Explain how auxin affects stem elongation.
Differentiate between auxins and gibberellins.
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