The Nitrogen Cycle

Because nitrogen atoms make proteins and our body organisms maintain of protein.

Because atmospheric nitrogen can't be used by plants and animals. Only by soil.

They consume the plants that absorb nitrate.

nitrification it is the conversion of ammonia first into nitrites then into nitrates by nitrifying bacteria and denitrification is the conversion of nitrites and nitrates into free nitrogen.

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.