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Question

The movement of stems and roots in response to pull of gravity is known as:

A
Geotropism
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B
Hydrotropism
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C
Thigmotropism
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D
Chemotropism
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Solution

The correct option is A Geotropism
  • Geotropism is the movement or growth of parts of plants in response to the force of gravity. The upward growth of plant shoots is negative geotropism; the downward growth of roots is positive geotropism.
  • Hydrotropism is the growth or turning of plant roots towards moisture (water).
  • Thigmotropism is a movement in which a plant moves or grows in response to touch or stimuli.
  • Chemotropism is the growth or movement of a plant or plant parts in response to a chemical stimulus.
  • So, the correct answer is option A.



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