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← Nature & AnimalsWhich metabolic shift results when aquatic CAM plants experience submersion?
A)Increased nocturnal CO₂ fixation
B)Suppressed carbonic anhydrase activity
C)Shift to C3 photosynthetic pathway✓
D)Enhanced RuBisCO oxygenase activity
💡 Explanation
Submerged aquatic CAM plants shift towards the C3 pathway because reduced oxygen diffusion limits photorespiration. Therefore, stomatal closure isn't necessary, rather than CAM, which requires temporal separation of CO₂ fixation. This benefits the overall photosynthetic efficiency.
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