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← Nature & AnimalsWithin root nodules, which mechanism optimizes rhizobia-facilitated nutrient uptake of legumes?
A)Leghemoglobin regulating oxygen concentration✓
B)Mycorrhizae increasing root surface area
C)Exudates attracting predatory nematodes
D)Lignin layering modulating soil humidity
💡 Explanation
Leghemoglobin delivers oxygen, driving cellular respiration. It prevents oxygen damage to nitrogenase (the enzyme responsible for Nitrogen Fixation, while facilitating ATP production). Therefore, specialized root respiration occurs, rather than impaired cellular function under varying partial pressure.
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