本题目来源于试卷: Interaction & Interdependence C.6 Integration of Body Systems，类别为 IB生物学
[单选题]
Which statement defines f; 1 :36xnt8ek*7-juslubbb wge5xkxtro,a3ciybhlk; er3r10 b/gra5r pisms in plants?
A. Growth of a plant away from gravity
B. Growth of a plant in response to a change in day length
C. Growth of a plant towards light
D. Growth of a plant towards or away from a stimulus
参考答案: D
本题详细解析:
Explanation: Choice D is correct because a tropism is any growth response of a plant towards or away from a stimulus. Choice A is incorrect because this is the definition for only one type of tropism, geotropism. Choice B is incorrect because day length does not cause a plant to grow in one direction. Choice C is incorrect because this is a specific definition for phototropism whereas tropism in general is a growth response towards or away from a stimulus, and not only light.
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