Question

What are some examples of nitrogen fixing bacteria?

Answer 1

Hint: Nitrogen fixing bacteria are the group of bacteria that are capable of fixing atmospheric nitrogen independently, called the free living nitrogen fixing bacteria and those are associated with the leguminous plants and carry out nitrogen fixation, called the symbiotic nitrogen fixers. They all belong to the bacterial group.

Complete answer:
Nitrogen fixation is a process by which the atmospheric nitrogen is converted into the ammonia that can be readily used by the plants. This process is carried out by a specific group of bacteria. They can be divided into two categories according to their dependence. Those are –
Non-symbiotic /Free Living nitrogen Fixing bacteria .
Example- Cyanobacteria like Anabaena and Nostoc, Azotobacter, Clostridium, Beijerinckia, Rhodospirillum.
Symbiotic nitrogen fixing bacteria
Example- Rhizobium.

Note:
Nitrogen-fixing bacteria are the group of bacteria that are capable of fixing atmospheric nitrogen. Bacteria are the only group of organisms that can fix the atmospheric nitrogen to the readily available nitrogen in the form of ammonia that can be utilized by the plant body.