Environmentalhard · Past Paper
What is the main role of 'Denitrifying bacteria' in the nitrogen cycle?
AConverting ammonia to nitrites
BConverting nitrates to nitrogen gas
CConverting nitrogen gas to ammonia
DFixing nitrogen in roots
✓ Correct Answer: B — Converting nitrates to nitrogen gas
Denitrifying bacteria reduce nitrates (NO3-) and nitrites (NO2-) into nitrogen gas (N2), releasing it back to the atmosphere.
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