Question

which gas is absorbed by micro organisms rhizobium

Answer 1

the gas which is absorbed by micro organisms rhizobium is nitrogen

Answer 2

The true answer of the question "nitrogen".

Rhizobium microbes are present in the nodules of the plants like leguminous plants which includes gram and pea etc.

These bacteria are the nitrogen fixing bacteria which converts the nitrogen from air in to the  nitrates that are water soluble form of nitrogen which can be absorb and use easily by the plants for their proper functioning ,growth as well as the development.These bacteria are helpful in the growth of a plant.