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← Nature & AnimalsWhich impact results when elevated atmospheric carbon dioxide causes partial stomatal closure in plants?
A)Reduced evaporative cooling efficiency✓
B)Increased nutrient uptake from soil
C)Enhanced photosynthetic oxygen release
D)Decreased susceptibility to fungal infections
💡 Explanation
When CO2 levels rise, stomatal closure is triggered through abscisic acid signaling, reducing transpiration rates because water vapor exit is limited, leading to reduced plant evaporative cooling. Therefore, cooling efficiency decreases, rather than increased nutrient absorption, enhanced oxygen release, or decreased fungal susceptibility requiring other mechanisms.
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