Rhizobium bacteria, which fix atmospheric nitrogen into soil, live mainly in:
ACattle stomach
BSurface of plant leaves
CRoot nodules of leguminous plants
DHuman intestine
Answer & Solution
Correct answer: C. Root nodules of leguminous plants
Rhizobium colonises the root nodules of legumes like beans, peas and gram. Inside these nodules it converts atmospheric N₂ into compounds the plant can absorb — a symbiotic relationship that enriches soil fertility.
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