Nif genes code for the enzymes which accomplish this process in bacteria, and those complexes have an iron-molybdenum enzyme which transfers 6 electrons by consuming 12 ATP.
The Azolla ferns form symbiotic relationships with Anabaena cyanobacteria to help the ferns in this process, and some cyanobacteria used specialized structures called heterocysts to perform it. Nif genes code for the enzymes which accomplish this process in bacteria, and those complexes have an iron-molybdenum enzyme which transfers 6 electrons by consuming 12 ATP. It is most commonly performed by plants which have bacteria called Rhizobia in their root nodules. On the industrial scale, this is accomplished with the help of an iron catalyst and is co-named for Carl Bosch. For 10 points, identify this process which sees the reduction of a certain element from its oxidized form into ammonia. 
The Azolla ferns form symbiotic relationships with Anabaena cyanobacteria to help the ferns in this process, and some cyanobacteria used specialized structures called heterocysts to perform it.
{nitrogen fixation} [prompt on {nitrogen reduction} or equivalents]