For the existence of nitrogen, how many nitrogen atoms are required?

Nitrification is the process of conversion of

Biological nitrogen fixation is conversion of

Enzyme required for nitrogen fixation is

The enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in the leguminous root nodules is

Nitrates are converted into nitrogen by

Number of ATP required for the formation of $4N{H_3}$ molecules via symbiotic nitrogen fixation is

Which one of the following is not a nitrogen-fixing organism?

Which of the following gene clusters in bacteria is responsible for nitrogen fixtion?

Which form of nitrogen enters in the plants

Nitrogen is absorbed by the plants in the form of