Question

Nitrogen needs to be converted into different forms to be more usable for plants to use. Which organism is an important part of this process?

Answer 1

Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. The majority of nitrogen is fixed by bacteria, most of which are symbiotic with plants. Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria.