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Ecology Chap 22
Biogeochemical Cycle
5
Biology
Undergraduate 4
11/11/2009
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Term
Biogeochemical Cycle
 Definition
Movement of elements or compounds through living organisms.
Term
Nitrogen Fixation
 Definition
Conversion of atmospheric nitrogen to forms usable by organisms.
Term
Ammonification
 Definition
Breakdown of proteins and amino acids, especially by fungi and bacteria, with ammonia as the excretory byproduct.
Term
Denitrification
 Definition
Reduction of nitrates and nitrites to nitrogen by microorganisms.
Term
Nitrification
 Definition
Breakdown of nitrogen-containing organic compounds into nitrates and nitrites.
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