Passive water absorption by root system is due to

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Forces created in the cells of the root

Osmotic force in the shoot system

Increased respiratory activity in the cells of the root

Tension in the sap as a result of transpiration

answer is D.

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Detailed Solution

Passive water absorption by root system is due to tension in the sap as a result of transpiration.

Because of loss of water through transpiration, the leaves and other apical parts require huge amounts of water. This creates a tension in the xylem and neighbouring tissues. Since there is a significant drop in the water potential in the xylem as well as the root region and the water potential of the soil is higher than the roots. So the roots start absorbing water passively as water flows from high water potential to low water potential.

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