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← Nature & AnimalsWhich outcome occurs when a CAM plant converts malate back to pyruvate?
A)Carbon capture ceases entirely overnight
B)Stomata open, releasing stored carbon
C)Photorespiration efficiency dramatically increases there
D)Rubisco within the chloroplast refixes CO2✓
💡 Explanation
Carbon is released internally to the Calvin cycle to fix CO2. This uses rubisco's carboxylase functions; the malate is converted back, supporting daytime photosynthesis because stomata remain closed. The plant, therefore, minimizes water loss while fixing carbon, rather than losing it to open stomata.
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