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← Nature & AnimalsWithin legume root nodules, which mechanism maintains optimal ammonia production?
A)Leghemoglobin oxygen buffering✓
B)Proton gradient regulation
C)Xylem nutrient transport
D)Phloem sugar distribution
💡 Explanation
Leghemoglobin regulates the free oxygen concentration, preventing inactivation of nitrogenase enzymes; therefore, efficient nitrogen fixation continues. This mechanism stabilizes ammonia production, rather than processes like proton gradients or xylem/phloem transport which play different metabolic roles.
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