Q.
Cohesion-tension-transpiration pull theory explains
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a
Ascent of sap through xylem
b
Ascent of sap through phloem
c
Descent of sap in xylem
d
Guttation
answer is A.
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Detailed Solution
Most researchers agree that water is mainly ‘pulled’ through the xylem of plant, and that the driving force for this process is force developed in the leaves due to transpiration. Cohesive forces aid in the process. Hence it is referred to as the cohesion-tension-transpiration pull model of water transport in xylem.
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