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If plant roots get enough water but the leaf stomata remain continuously closed, which effect is most likely?

Answer and explanation

Correct answer: Carbon dioxide entry will decrease and photosynthesis will reduce

The governing concept is the dependence of photosynthesis on stomatal gas exchange. Stomata provide the main pathway for carbon dioxide to enter the leaf. If they stay closed, carbon-dioxide availability falls even though the roots supply sufficient water. The reduced carbon dioxide limits glucose and starch formation, so photosynthesis decreases. Option A gives both linked effects. Xylem does not carry food, chlorophyll does not convert oxygen into starch, and plants have no kidneys.

Related tags

StomataPhotosynthesisGas ExchangePlant TransportLife ProcessesWorld Of LivingScienceClass 10 Mcq

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