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A Typical Flower

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Question

When flowering is regulated by length of day and night, it is called as

A

Photoperiodism

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B

Phototropism

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C

Nyctinasty

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D

Tropism

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Solution

The correct option is A 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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