Question

Some cells can carry out what process to make ATP when there's NO oxygen?


photosynthesis


chemosynthesis


fermentation

Answer 1

When there is no oxygen, some cells can carry out **fermentation** to make ATP. Fermentation is an anaerobic process that allows cells to generate energy without using oxygen. In contrast, photosynthesis and chemosynthesis are processes that typically involve energy capture and conversion and are not mechanisms for ATP production in the absence of oxygen.