The force of tension cohesion exceeds root pr | vedclass

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Question

(C) The cohesion-tension theory explains the ascent of sap in plants. On a $Sunny day$, the rate of transpiration is very high due to high temperature

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Sunny day

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(C) The cohesion-tension theory explains the ascent of sap in plants. On a $Sunny day$, the rate of transpiration is very high due to high temperature and low humidity. This high rate of transpiration creates a strong negative pressure (tension) in the xylem vessels, which pulls the water column upwards. This tension force significantly exceeds the root pressure, which is generally low and insufficient to push water to the top of tall trees.

The force of tension cohesion exceeds root pressure on a

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