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How does transpiration help water rise in a plant?

Answer and explanation

Correct answer: Loss of water vapour from leaves creates a pull

The governing concept is transpiration pull, supported by cohesion between water molecules and adhesion to xylem walls. When water vapour escapes through stomata, the water level in leaf tissues falls and tension develops in the continuous xylem column. This tension pulls water upward from the roots, helping replace the lost water. Hence option A is correct; phloem transports food, and the other choices are biologically unrelated.

Related tags

Transpiration-PullXylemWater-TransportLife ProcessesWorld Of LivingScienceClass 10 Mcq

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