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21 questions
Their nitrogen returns to the soil as ammonium and air as atmospheric nitrogen
Photosynthesis moves carbon to the air as CO2
Denitrifying bacteria convert
NO3 to N2
NH4+ to NO3
N2 to NH4+
none of these
Eutrophication is a man made source when there is too much
oxygen in the atmosphere
phosphates in the geopsphere
Nitrates in the hydrosphere
carbon in the atmosphere
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