Your Request List (). Your Request List. You can add items by clicking the Add to Request List button or checkbox when you find something you're interested in. You may add up to 15 items to your Request List. Your request list will follow you around the site.
All organisms use the ammonia (NH3) form of nitrogen to manufacture amino acids, proteins, nucleic acids, and other nitrogen-containing components necessary for life. Biological nitrogen fixation is the process that changes inert N2 to biologically useful NH3.
Nitrogen fixation is the natural process by which atmospheric nitrogen (N2) is converted into ammonia (NH3), or nitrate forms. This step is important for the continuation of ecosystems because plants depend on nitrates and nitrites, and nitrogen gas is not a usable form for plants to intake.