Question

Why are bacteria needed in the nitrogen cycle?

Answer 1

Nitrogen-fixing bacteria fix gaseous nitrogen from the atmosphere to organic nitrogen, which enters terrestrial food webs and exits them as nitrogenous waste that goes to the soil. ... Nitrifying bacteria transform ammonia into nitrite, NO2-, and then nitrate, NO3-

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Answer 2

Because atmospheric nitrogen can't be used by plants and animals. ... Why are bacteria important to the nitrogen cycle? because when bacteria converts ammonia into nitrate and nitrite, producers need them to make proteins and then consumers eat the producers and reuse the nitrogen to make their own proteins.

Step-by-step explanation: