The rate of transpiration ........... the process of ascent of sap.

Increases

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Decreases

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Do not affect

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Increases and then decreases

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Solution

The correct option is C Increases
Transpiration causes the development of a pull or a negative pressure region which created a suction force to aid the ascent of sap. It increases the process of ascent of sap.
So the correct answer is 'Increases'.

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