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← Nature & AnimalsWhich outcome occurs when guard cell turgor pressure drops excessively in plant leaves during drought conditions?
A)Stomata close limiting CO2 uptake✓
B)Photosynthesis increases boosting sugar production.
C)Transpiration significantly reduces temperature.
D)Chlorophyll production accelerates dramatically.
💡 Explanation
When drought occurs, abscisic acid triggers potassium channels in the guard cells, causing water to exit via osmosis, thus reducing turgor pressure; consequently, stomata close, limiting CO2 intake for photosynthesis as a protective adaptation. Therefore stomata close, rather than promoting processes that exacerbate desiccation.
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