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Question
Which of the following terms denotes the movement of the root of a plant towards moisture in the soil?
(a) thigmotropism
(b) chemotropism
(c) hydrotropism
(d) geotropism
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Solution
(c) Hydrotropism
Hydro means water and tropism means movement. Thus, the movement of plant roots towards the moisture in the soil is called hydrotropism.
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