NURSING ANM AND GNM

Detailed explanation-1: -Rhizobium is the bacteria that live in symbiotic association with the root nodules of the leguminous plants. Fixation of nitrogen cannot be done independently. That is why rhizobium requires a plant host. Rhizobium is a vital source of nitrogen to agricultural soils including those in arid regions.

Detailed explanation-2: -Rhizobium is symbiotic nitrogen fixer bacteria which is found in root nodules of leguminous plants. Azotobacter is a non-symbiotic nitrogen fixer bacteria. So, the correct option is ‘False’.

Detailed explanation-3: -Examples of symbiotic nitrogen-fixing bacteria include Rhizobium, which is associated with plants in the pea family, and various Azospirillum species, which are associated with cereal grasses.

Detailed explanation-4: -Rhizobia are one of several group of bacteria capable of ‘fixing’ nitrogen, i.e. converting dinitrogen gas into ammonia and then into organic molecules such as amino acids.