Question

what do you mean by biological nitrogen fixer?​

Answer 1

Answer:

biological n2 fixer is rhibozium bacteria

Explanation:

It fixes atm. n2 into soluble n2

Answer 2

Answer:

Some bacterias like Rhizobium bacteria changes the nitrogen to nitrogenous compounds and fixes them into the soil . This helps the plants to take nitrogen . This is called biological nitrigen fixer. Some other ex. lightning fixation .