In this chapter outline, the learning objectives
and the selected key terms are given for each major head in the
chapter.
1. Describe response to a stimulus in terms of a reception (or perception)-transduction-response pathway.
How Plants Respond to Stimuli (p. 568)
2. Describe three types of tropisms and ways that plants respond to stimuli;
indicate any involvement of plant hormones in these responses.
3. Describe nastic movements as requiring turgor pressure changes.
4. Provide evidence that a biological clock functions in plants.
Selected Key Terms: tropism, phototropism, gravitropism, thigmotropism,
circadian rhythm, biological clock
Plant Hormones Coordinate Responses (p. 572)
5. Name three types of hormones that promote growth, and describe their
primary functions.
6. Describe early experiments showing that a hormone is involved in phototropism.
7. Describe how auxin is believed to bring about cell elongation.
8. Indicate the manner in which plant hormones function according to gibberellin research.
9. Describe a tissue culture experiment demonstrating that plant hormones interact.
10. Name two types of hormones that inhibit growth, and describe their functions.
hormone, auxin, gibberellin, cytokinin, abscisic acid (ABA), ethylene, abscission
The Photoperiod Controls Seasonal Changes (p. 580)
11. Discuss the relationship of photoperiodism to flowering in certain plants.
12. Explain the phytochrome conversion cycle, and suggest possible functions
of phytochrome in plants.
photoperiodism, phytochrome
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