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How can transpiration pull be both useful and problematic for a plant on a hot day?

Answer and explanation

Correct answer: It pulls water upward but also increases water loss

The governing concept is the transpiration pull in the xylem stream. Water evaporating from leaf surfaces creates tension that helps draw water and dissolved minerals upward from the roots. This supports transport and cooling, but a hot, dry day can greatly increase evaporation. If water loss becomes faster than absorption, the plant may wilt and its stomata may close, reducing gas exchange. Hence option A correctly states both effects.

Related tags

Transpiration PullWater LossXylemLife ProcessesWorld Of LivingScienceClass 10 Mcq

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