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← Nature & AnimalsWhich outcome occurs when a plant's stomata remain closed under high light intensity?
A)Photorespiration rate increases significantly✓
B)Active transport of water accelerates
C)Nitrogen fixation in root nodules peaks
D)Synthesis of chlorophyll is enhanced
💡 Explanation
When stomata close under high light, CO2 entry decreases due to diffusional limitations, while oxygen from photosynthesis accumulates, thus ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) favors oxygenation of RuBP due to high oxygen: CO2 ratio promoting photorespiration. Therefore significantly increased photorespiration results, rather than transport, fixation, or chlorophyll, all requiring open stomata.
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