Biology for IGCSE & O level - Organisms And Their Environment (Section 5 - No. 1)
What are the roles of the different bacteria involved in the nitrogen cycle?
Nitrogen-fixing bacteria convert atmospheric nitrogen into ammonia.
Nitrifying bacteria convert ammonia into nitrites and then nitrates.
Denitrifying bacteria convert nitrates back into nitrogen gas.
Decomposers convert dead organic matter into nitrates.
Explanation
The nitrogen cycle involves various bacterial groups transforming nitrogen compounds.
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