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← Nature & AnimalsWhich photosynthetic bottleneck impacts plant growth as temperature rises?
A)Rubisco's oxygenase activity increases greatly✓
B)Stomata close preventing CO2 uptake
C)Chlorophyll production becomes thermally inhibited
D)Photorespiration increases ATP energy output
💡 Explanation
Increased temperatures favor rubisco’s oxygenase activity rather than carboxylation, leading to increased photorespiration. This occurs because oxygen solubility does not decrease as much at higher temperatures as carbon dioxide solubility; therefore, favoring oxygen fixation rather than carbon.
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