In this process, three successive pairs of hydrogen atoms are added to the namesake gas to form two molecules of ammonia.
Organisms that both perform this process and respire aerobically make use of leghemoglobin. This process is performed by the filamentous actinomycetes, which are symbiotic with mountain lilacs, and by (*) Rhizobium, which infect legumes to form root nodules. In this process, three successive pairs of hydrogen atoms are added to the namesake gas to form two molecules of ammonia. For 10 points, name this process by which a common, inert gas is converted into a biologically useful form.
Organisms that both perform this process and respire aerobically make use of leghemoglobin.
{nitrogen fixation}