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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Chapter 38.2, Problem 2R
Summary Introduction
To review:
The defenses, which work together, to protect tobacco plant from herbivores.
Introduction:
Plants have various defenses against herbivores. These defenses can be both chemical and mechanical. The chemical defenses used by the plants are usually using a range of chemical substances called secondary metabolites. These metabolites are not used in basic cellular functioning. Rather, they have a protective role. Plants have also evolved induced defenses in case they are attacked by pathogens. Tobacco plants produce a substance known as nicotine which is a secondary metabolite. They also have other induced defenses, which protect the plant against herbivores.
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Chapter 38 Solutions
Life: The Science of Biology
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- 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 insectsarrow_forwardWhat are the roles of caffeine in plant defense and survival. Explain and discuss it thoroughly. I need a comprehensive answer, please do not just copuy from somewhere.arrow_forwardChoose the one answer that fits best. Which of the following is NOT true with respect to plant defenses? O a. Plants are susceptible to infections by bacteria and fungi. O b. Some plant produce chemicals that inhibit the growth of other plant species. O c. Some plant produce pheromones to alert other members of the same species of the presence of herbivores. d. Some plants produce volatile chemicals with strong odors that are unpleasant to herbivores. e. All plants produce toxic chemicals to prevent infection from bacteria and fungi as well as to deter herbivores.arrow_forward
- Plants have systemic defense mechanisms ( those that are not normally active but can be induced when the plant is under attack) describe an example of one systemic defense, including the processes, structures and/or molecules involved.arrow_forwardWhich of the following are examples of indirect chemical defenses? (Select all that apply). Extrafloral nectar Toxins Trichomes Compounds that make the plant taste bad Volatile organic compounds (VOCs)arrow_forwardRubisco is sensitive to Oxygen and to Heat. How would you protect it?arrow_forward
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- Plants have systemic defense mechanisms (i.e., those that are not normally active but can be induced when the plant is under attack). Briefly describe an example of one systemic defense, including the processes, structures and/or molecules involved.arrow_forwardCan the specific component of the plant immune system (the one using R genes) defend against both biotrophic and necrotrophic pathogens?arrow_forwardComparison between plants and humans defensessarrow_forward
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