Question

give the biological importance of nitrogen present in the air we breathe.

Answer 1

nitrogen can't be directly inhaled by animals nor plants. but it is necessary for the body to make up nucleic acids. leguminous plants have rhizobium in their roots which absorbs the atmospheric nitrogen break them into compounds of nitrogen like nitrites and nitrates which enable the roots of the plant to absorb easily and thus help in synthesis of nucleic acids. when animals consume plants indirectly nitrogen enter the body and helps in synthesis of nucleic acid