Which events can occur in the nitrogen cycle?
1) Inorganic nitrogen in the atmosphere undergoes denitrification by specific prokaryotes.
2) Nitrate concentrations in the soil are increased by nitrifying bacteria in waterlogged soil.
3) Organic nitrogen in legumes passes into the soil where deamination and ammonification occurs.
4) Saprotrophic fungi living in the soil decompose organic nitrogen in faeces.
1 )
1 only
2 )
2 only
3 )
1 and 4
3 and 4
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