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The upward and downward growth of shoots...

The upward and downward growth of shoots and roots, respectively, in response to the pull of gravity is called `"______"`.

A

1.hydrotropism

B

2.chemotropism

C

3.phototropism

D

4.geotropism

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The correct Answer is:
D
Growth of a plant or immovable animal in response to the pull of Gravity is called Geotropism. Roots display positive geotropism when they grow downwards while shoots display negative geotropism when they grow upwards.
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