Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 37, Problem 15PIAT
Summary Introduction
To review:
An experiment to test the hypothesis that rapid leaf movements in Mimosa serve as a defense mechanism.
Introduction:
It has been hypothesized that the rapid closing of the leaflets is a defense mechanism of the plant. It is believed that the leaflets close in order to prevent the consumption of the plant by the animals.
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Chapter 37 Solutions
Biological Science (7th Edition)
Ch. 37 - Prob. 2TYKCh. 37 - Prob. 3TYKCh. 37 - 4. What evidence suggests that ABA from roots can...Ch. 37 - Why was it logical to predict that amyloplasts...Ch. 37 - Prob. 6TYUCh. 37 - To explore how hormones function, researchers have...Ch. 37 - Prob. 8TYUCh. 37 - Prob. 9TYPSSCh. 37 - Prob. 10TYPSSCh. 37 - Prob. 11PIAT
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- Tobacco plants invest a lot of resources into the production of secondary compounds know as alkaloids (e.g., nicotine) that we believe act as defenses against herbivores. The researchers did an experiment where they added a hormone that reduces the production of alkaloids. In graph (a), the data show that the hormone reduced the proportion of alkaloids as a function of leaf mass relative to controls- so the hormone worked. They also measured the lifetime seed production of the plants in both treatments without any herbivores present (b). They had the following results. What might you conclude/hypothesize/investigate based on the data in graph (b) (a) Chemical defenses (percent of leaf mass) 1.8% 1.4 1.0 0.6 0.2 No hormone added Hormone added (b) Lifetime seed mass (g/plant) -18 14 10 No hormone added Hormone added It would be good to test whether the hormone is very specific or whether it might also cause changes in other metabolic processes The hormone has no effect on the lifetime…arrow_forwardEXPERIMENT: INITIATION OF CALLUS AND CELL SUSPENSION IN SELECTED PLANTS Please make a general introduction paragraph about this experiment.arrow_forwardCan you answer all the parts to this question please (a) What are the advantages of the self-incompatibility (SI) system in plants? Give at least three advantages. (b) What are the differences between gametophytic SI and sporophytic SI?arrow_forward
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