Q.

Which of the following is an example of negative gravitropism?

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a

Roots growing towards the gravitational pull

b

Stems growing away from the gravitational pull

c

 Leaves growing towards the gravitational pull

d

Flowers growing away from the gravitational pull

answer is B.

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Detailed Solution

The movement of plant parts in response to the force of gravity is called geotropism.

If the plant part moves against the direction of gravity, it is negative geotropism. The stem of a plant moves upwards against the direction of gravity, so the stem of a plant shows negative geotropism.
 

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