which of the folllowing is not involved in this process is important biological process of fixing atmospheric nitrogen by microorganism

1. azotobacter
2. nitrosomonas
3. nostoc
4. anabaena

Hello Student
Correct answer is 2. Nitrosomonas
A number of free living bacteria and blue-green algae take up gaseous nitrogen and change in it into organic form of nitrogen. This process is nitrogen fixation. Nitrosomonas is involved in denitrification process.