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← Nature & AnimalsWhich outcome increases when nitrogen fixation pathways are suppressed in legume root nodules?
A)Accumulation of atmospheric ammonia
B)Increased symbiotic fungi activity
C)Diminished plant biomass production✓
D)Reduced insect herbivore infestation
💡 Explanation
When nitrogen fixation pathways are suppressed, the enzyme nitrogenase is inhibited because the plant's ability to convert atmospheric nitrogen into usable ammonia is compromised, leading to nutrient deficiency. Therefore, diminished biomass results, rather than ammonia accumulation, fungal increase, or herbivore reduction because those processes depend on nitrogen assimilation.
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