Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Question
Chapter 36.3, Problem 1R
Summary Introduction
To review:
The auxin to cytokinin ratio of a plant with a bushy type of growth habit.
Introduction:
Hormones of the plant essentially act as signaling molecules that regulate growth and control a lot of physiological functions of the plant. They are only required in small quantities. Different plant hormones are required for different processes. For example, ethylene promotes fruit ripening and abscisic acid stimulates seed dormancy.
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. Explain the role auxin would have on sunflower plant growth and the steps of growth.
Which combination of hormones is best for promotingthe formation of lateral roots from pericycle?a. A high auxin level and low cytokinin levelb. A low auxin level and high cytokinin levelc. A high level of auxin and cytokinin
• 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 __________.
Chapter 36 Solutions
Life: The Science of Biology
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- What do you mean by auxin?arrow_forwardThe summer is not optimal for grape growing and you're searching in your memory for something regarding plant hormones. Explain 2 ways you could utilize plant hormones (choose from auxin, ethylene, cytokinin, gibberellin, abscisic acid, salicylic acid, jasonic acid) to compensate for a problem during growing. For each way:arrow_forwardThis is a picture of the initial experiments to figure out how auxin and phototropism worked. How do you expect the plant will grow in each scenario and why?arrow_forward
- Auxin causes the bending of shoot toward light by?A. Causing cells to shrink on the dark side of the shootB. Causing cells to shrink on the lighted side of the shootC. Inhibiting growth on the dark side of the shootD. Stimulating growth on the lighted side of the shootE. Stimulating growth on the dark side of the shootarrow_forwardWhich hormone can regulate guard cells? Select one: a. ethylene b. abscisic acid c. gibberellin d. cytokinin e. auxinarrow_forwardAuxin, like many substances, can be transported through the phloem; however, there is a second mechanism that exists just for auxin transport. What is it?arrow_forward
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