The nitrogen cycle
Schematic representation of the flow of nitrogen through the environment. The importance of bacteria in the cycle is immediately recognized as being a key element in the cycle, providing different forms of nitrogen compounds assimilable by higher organisms.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Nitrogen%252525252520Cycle."
http://en.wikipedia.org/wiki/File:Nitrogen_Cycle.svg
Wikipedia
CC BY-SA 3.0.
