1
Q
process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another
A
Biogeochemical Cycle
2
Q
chemical substance that an organism needs to sustain life
A
Nutrient
3
Q
process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
A
Nitrogen Fixation
4
Q
process by which bacteria convert nitrates into nitrogen gas
A
Dentrification
