Campbell Biology in Focus
Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 31, Problem 2TYU
Summary Introduction

Introduction:

Auxin is the plant hormone that is responsible for promoting the coleoptiles elongation. They even have various other functions in the flowering plants. Natural auxin is called as IAA (indoleacetic acid).

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briefly describe the cell elongation in response to auxin
•    On a commercial scale, enhancing the level of _______ (hormone) can help to speed up fruit ripening. •    What measure do fruit producers take to slow down fruit ripening that is caused by natural ethylene?•    What is a ‘triple response’. Which plant hormone initiates a triple response? •    A change in the ratio of ethylene to auxin controls abscission. In the autumn, the amount of __________ decreases, rendering the cells of the abscission layer more sensitive to __________.
Which of the following is the function of cytokinin? A. activation of defense response from biotrophic and hemi-biotrophic pathogens B. structurally related to animal steroid hormones for growth and development C. long distance (root-to-shoot) signals for nitrogen assimilation D. defense from necrotrophic pathogens and herbivore insects
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