Microorganisms can do remarkable things—for example, nitrogen fixation, the conversion of nitrogen gas (N₂) into a form that organisms can use. Although nitrogen gas makes up around 78% of Earth's atmosphere, plants and animals cannot directly use it.
Microorganisms can do remarkable thingsfor example, nitrogen fixation, the conversion of nitrogen gas (N) into a form that organisms can use. Although nitrogen gas makes up around 78% of Earth's atmo… [+6463 chars]