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.
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What is the correct answer to this question?
It pulls water upward but also increases water loss
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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