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
Chapter 31 Solutions
Campbell Biology in Focus
Ch. 31.1 - Prob. 1CCCh. 31.1 - WHAT IF? If a plant has the double mutation ctr...Ch. 31.1 - Prob. 3CCCh. 31.2 - If an enzyme in field-grown soybean leaves is most...Ch. 31.2 - WHAT IF? If a plant flowers in a controlled...Ch. 31.2 - MAKE CONNECTIONS Plants detect the quality of...Ch. 31.3 - Prob. 1CCCh. 31.3 - Prob. 2CCCh. 31.3 - Prob. 3CCCh. 31.4 - Prob. 1CC
Ch. 31.4 - Chewing insects mechanically damage plants and...Ch. 31.4 - Prob. 3CCCh. 31 - The hormone that helps plants respond to drought...Ch. 31 - Prob. 2TYUCh. 31 - Prob. 3TYUCh. 31 - Prob. 4TYUCh. 31 - Prob. 5TYUCh. 31 - Prob. 6TYUCh. 31 - DRAW IT Indicate the response of Arabidopsis to...Ch. 31 - Prob. 8TYUCh. 31 - FOCUS ON EVOLUTION As a general rule,...Ch. 31 - FOCUS ON INTERACTIONS In a short essay (100-150...Ch. 31 - Prob. 11TYU
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- Explain the signaling mechanism associated with auxin actionarrow_forwardSome plants are recognized by fungal pathogens on the basis of their stomatal pores. Which of the following would provide these plants immunity from fungal infection? a. Removing all of the stomata from the plant b. Changing the spacing of stomatal pores in these plants c. Reinforcing the cell wall in the guard cells of stomatal pores d. Increasing the number of trichomes on the surfacesarrow_forwardPlant cells communicate in a variety of ways to elicit cellular responses. In the figure below the plant is responding the presence of light with the release of auxin. Auxin was first discovered for its ability to promote growth in plants. It is a plant hormone that inhibits the lengthening and stimulate the formation of lateral roots and root hairs. (b) Explain the role that auxin has in eliciting the plant’s response.arrow_forward
- Explain auxin’s effect on growth and how it causes plant cellsto enlarge.arrow_forwardWhich of the following may stimulate the growth of the roots in plant cuttings? Select one: a. The use of auxins. b. A decrease in soil minerals. c. A decrease in enzymes. d. The use of endocrine secretions.arrow_forwardWhich of the following does auxin cause in the tropism with which it is involved? increased protein synthesis increased plasma membrane permeability hardening of cell walls cell elongation rapid cell divisionarrow_forward
- Gaseous hormones are able to enter cells without requiring specialmembrane transporter. Which of the major plant hormones is adiffusible gas?a. auxin b. gibberellin c. cytokinin d. ethylene e. abscisic acidarrow_forwardThe signaling molecule for flowering might be released earlierthan usual in a long-day plant exposed to flashes of(A) far-red light during the night.(B) red light during the night.(C) red light followed by far-red light during the night.(D) far-red light during the dayarrow_forwardHow does the signal transduction pathway for auxin that leads to cell wall loosening. Include the receptors ABP and ARF. How does the auxin pathway possibly differ from the 'generic' signal transduction pathway? Consider expressing the cellular components that differ in the absence and presence of auxin.arrow_forward
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