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Nastic Movements

Growth of the...

Question

Growth of the stem is controlled by:

A

Gibberellin

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B

Auxin

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C

Cytokinin

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D

Abscisic acid

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Solution

The correct option is B Auxin
Auxins promote cell enlargement and cell differentiation in plants leading to growth. They are produced by cells at the tip of stem and roots. They can also drastically affect plant orientation by promoting cell division in one side of the plant in response to sunlight and gravity.

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