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← Nature & AnimalsWhich outcome occurs when high oxygen concentration outcompetes carbon dioxide binding within C3 photosynthetic pathways?
A)Photorespiration reduces net carbon fixation✓
B)Chlorophyll synthesis increases by feedback loop
C)Stomatal closure prevents water transpiration
D)Electron transport chain enhances ATP production
💡 Explanation
When oxygen concentration is high, photorespiration occurs because Rubisco binds with O2 instead of CO2, resulting in a loss of fixed carbon. Therefore net carbon fixation decreases, rather than chlorophyll increase, stomatal closure, or enhanced ATP production processes which depend on different biochemical conditions.
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