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← Nature & AnimalsWhich metabolic consequence results because legume productivity is limited?
A)Limited overall root nodule respiration
B)Reduced ATP production for cells
C)Low nitrogen assimilation rates occur✓
D)Insufficient iron chelation in rhizobia
💡 Explanation
Low available soil phosphorus constrains ATP production, which then limits nitrogen fixation via the nitrogenase enzyme's reduction of N2 to NH3. Therefore, nitrogen assimilation rates decline, rather than enabling adequate fixation because the necessary ATP is limiting.
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