Root pressure is highest when:

Absorption is low and transpiration is high

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Transpiration is low and absorption is also low

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Absorption is high and so is transpiration

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Transpiration is low and absorption is high

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Solution

The correct option is D
Transpiration is low and absorption is high

Root pressure is the pressure applied by the water on the roots of the plants during night time. Sap is forced up the stem by pressure developed by xylem cells of roots for upward movement of water.

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Similar questions

If the water content of the leaves decreases due to insufficient absorption of water by roots, the leaves wilt and transpiration is reduced.

Distinguish between

1 absorption and conduction

2 role of humidity and wind on the rate of transpiration

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