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Hw pg 79
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5
Biology
9th Grade
10/02/2014

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Term
Biogeochemical cycle
Definition
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
Term
Nutrient
Definition
Chemical substance that an organism needs to sustain life
Term
nitrogen fixation
Definition
Process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
Term
Denitrification
Definition
Process by which bacteria convert nitrates into nitrogen gas
Term
Limiting nutrient
Definition
Single essential nutrient that limits productivity in an ecosystem
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