General Bio II Ch. 25 Test in Text
Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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A substance produced in one part of the plant that affects another part is
a(n)
a. | hormone | b. | enzyme | c. | auxin | d. | phytochrome |
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2.
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A high concentration of auxins can inhibit plant growth. Many of these compounds
are used as
a. | herbicides | b. | pesticides | c. | fruit
ripeners | d. | growth stimulants |
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3.
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In the illustration below, what phenomenon is responsible for the shape of the
plant on the left?
a. | gravitropism | b. | dormancy | c. | phytochromes | d. | apical
dominance |
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4.
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Substances that stimulate cell division and cause dormant seeds to sprout
are
a. | gibberellins | b. | auxins | c. | cytokinins | d. | phytochromes |
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5.
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Japanese scientists found that the extraordinary growth of a certain rice plant
was caused by
a. | auxin | c. | cytokinin | b. | gibberellin | d. | ethylene |
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6.
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The response of a plant to touch is
a. | gravitropism | c. | photoperiodism | b. | phototropism | d. | thigmotropism |
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7.
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Photoperiodism is the response of plants to
a. | water and dryness | b. | light and darkness | c. | gravity | d. | nutrients |
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8.
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The period during which an organism’s growth and activity decreases or
stops is called
a. | abscission | b. | dormancy | c. | thigmotropism | d. | gravitropism |
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9.
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Plants that have air-filled spaces in their tissues are likely to be
a. | desert plants | c. | epiphytes | b. | aquatic plants | d. | parasites |
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10.
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Plants that grow directly on the bodies of other plants but manufacture their
own food are
a. | epiphytes | c. | carnivorous plants | b. | aquatic plants | d. | parasites |
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