General Bio II Ch. 25 STP
Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following are caused by auxins?
I. Apical dominance
II. Cell
elongation
III. Phototropism
a. | I only | d. | II and III only | b. | II only | e. | I, II, and III | c. | I and
II |
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2.
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Which of the following cause fruit to ripen?
a. | auxins | d. | 2, 4-D chemicals | b. | cytokinins | e. | gibberellins | c. | ethylene |
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3.
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Which is an example of thigmotropism?
a. | leaf abscission | d. | photoperiodism | b. | climbing vines | e. | bending toward light | c. | blooming |
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4.
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All of the following are plant adaptations to a desert climate EXCEPT
a. | thick stems | d. | many root hairs | b. | small leaves | e. | salt tolerance | c. | deep root
system |
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5.
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What causes a short-day plant to flower?
I. Continuous darkness for a certain
length of time
II. Phytochromes
III. At least 10 hours of continuous red light
a. | I only | d. | II and III only | b. | II only | e. | I, II, and III | c. | I and
II |
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6.
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Meristematic area on the side of a stem that gives rise to side branches
a. | Lateral bud | d. | Cytokinin | b. | Apical dominance | e. | Dormancy | c. | Gibberellin |
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7.
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Includes turning off photosynthesis and sealing the leaf off from the rest of
the plant
a. | Lateral bud | d. | Cytokinin | b. | Apical dominance | e. | Dormancy | c. | Gibberellin |
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8.
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Increases growth in plant stems and fruits
a. | Lateral bud | d. | Cytokinin | b. | Apical dominance | e. | Dormancy | c. | Gibberellin |
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9.
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Which of the following can be concluded from the result of this experiment
alone?
a. | Hormones are produced in the growing tips of plants | b. | Plants grow towards
the sun because of compounds produced in their stems | c. | Agar blocks contain a variety of plant
compounds | d. | Compounds produced in shoot tips can cause stems to bend | e. | Chemicals produced
in plant stems stimulate plant growth |
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10.
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Based on your knowledge of plant hormones, which of the following best explains
the results of this experiment?
I. Auxins produced in the shoot tip caused cell enlargement in the
growing stem
II. Cytokinins produced in the shoot tip caused cell enlargement in the growing
stem
III. Auxins produced in the shoot tip caused lateral bud growth
a. | I only | d. | I and III only | b. | II only | e. | none of the above | c. | III
only |
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