Question

the process where bacteria release nitrogen back into the atmosphere is called? cellular respiration ammonification and nitrification nitrogen fixation denitrification assimilation photosynthesis

Explanation:

Denitrification is the process where bacteria convert nitrates ($\text{NO}_3^-$) into nitrogen gas ($\text{N}_2$), releasing it back into the atmosphere. Cellular respiration is about energy production in cells. Ammonification and nitrification are parts of nitrogen cycling but don't release nitrogen to the atmosphere. Nitrogen fixation is the conversion of $\text{N}_2$ to ammonia. Assimilation is uptake of nitrogen compounds by plants. Photosynthesis is about making food using light.

Answer:

denitrification