Question

Which of these microorganisms lives in the root nodules of leguminous plants?

Answer 1

Correct option: (b) Rhizobium.

$\bullet$ Rhizobium lives in root nodules of leguminous plants and establish a symbiotic relationship with the plant.
$\bullet$ Rhizobium can fix atmospheric nitrogen, that is, it supplies the plants with nitrogenous compounds through nitrogen fixation.
$\bullet$ In return the legume plant furnishes a home and subsistence for the bacteria in root nodules.