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Question

Pigment phytochrome is involved in ..............

A
Hydrotropism
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B
Photorespiration
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C
Photoperiodism
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D
Geotropism
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Solution

The correct option is C Photoperiodism
Photoperiodism is the physiological reaction of organisms to the length of day or night. It occurs in plants and animals. Photoperiodism can also be defined as the developmental responses of plants to the relative lengths of light and dark periods.

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