PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cohesion between water molecules
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development of root pressure
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mass flow during translocation
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uptake of water by root hair cells
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Detailed explanation-1: -In the case of xylem, adhesion occurs between water molecules and the molecules of the xylem cell walls. Cohesion, which is molecular attraction between “like” molecules. In water, cohesion occurs due to hydrogen bonding between water molecules.
Detailed explanation-2: -Answer and Explanation: Water cohesion in xylem vessels is promoted by d. the vessel elements forming narrow tubes. These narrow tubes create capillary action, or the movement of water against gravity when in a narrow tube.
Detailed explanation-3: -The continuous flow of water in root xylem is due to transpiration pull. The water is lost through the stomata is replaced by xylem vessel . Evaporation of water molecules cells of cells of leaf creates a suction which pulls water from the xylem of roots to leaves.
Detailed explanation-4: -Xylem is responsible for transport of water. If xylem is blocked, the plant will undergo wilting due to the lack of proper transport of water.