Question

Root nodules are (i) ___ association, between (ii) ___

• A. (i) Mutualistic (ii) leguminous plant and rhizobium
• B. (i) Commensalistic (ii) leguminous plant and rhizobium
• C. (i) Parasitic (ii) plant and fungi
• D. (i) Parasitic (ii) leguminous plant and algae

Answer 1

The correct option is A (i) Mutualistic (ii) leguminous plant and rhizobium

Root nodules are mutualistic association, that is an interaction where both partners benefit, between a leguminous plant and a rod shaped bacteria present in soil called rhizobium. The rhizobium assists the plant in nitrogen fixation and in return the plant serves as a host for the bacteria providing shelter and nourishment.