Biology 4.3

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5 Terms

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biogeochemical cycles

process in which elements, chemical compounds, and other forms of matter are passed from one part of the biosphere to another.

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nutrient

chemical substance that an organism needs to sustain life

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nitrogen fixation

process of converting nitrogen gas into nitrogen compounds that plants can absorb and use

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denitrification

process by which bacteria convert nitrates into nitrogen gases

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limiting nutrient

single essential nutrient that limits productivity in an ecosystem