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Question

Which of the following processes is concerned with Cholodny-Went theory?



A

Photomorphogenesis

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B

Photoperiodism

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C

Phototropism

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D

Photorespiration

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Solution

The correct option is C

Phototropism


Phototropism of stem and roots are due to differential hormonal effect. The mechanism is believed to be based on Cholodny-Went theory, which states that unilateral light produces more auxin (IAA) and hence, more growth in the shaded side resulting in bending of the stem.


Biology

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