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← Nature & AnimalsWhich outcome occurs when a CAM plant experiences prolonged drought during the night cycle?
A)Malate accumulation reduction due to closed stomata✓
B)Increased RuBisCO oxygenase activity leading to photorespiration
C)Enhanced daytime CO2 fixation via PEP carboxylase
D)Elevated transpiration rates causing cellular dehydration
💡 Explanation
When a CAM plant experiences prolonged drought at night, stomatal closure prevents CO2 intake, restricting the dark reaction's carbon fixation via PEP carboxylase needed to produce malate, reducing its overnight accumulation. Therefore, reduced malate results, rather than increased photorespiration, enhanced daytime fixation, or elevated transpiration, each requiring different metabolic conditions.
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