The production of which substance would most likely indicate anaerobic cellular respiration?

The production of alcohol or lactic acid (depending upon kind of cells) indicate anaerobic cellular respiration.

Explanation:

There are two types of cellular respiration which are aerobic respiration and the another is anaerobic respiration.

Anaerobic respiration takes place without use of oxygen which produces less amount of energy in the body as compared to the aerobic respiration.

The products which are formed as a cause of anaerobic respiration are alcohol or lactic acid (depending upon kind of cells), carbon dioxide and water.

On the other hand, carbon dioxide and water are also the products of aerobic respiration.

So, the production of alcohol or lactic acid (depending upon kind of cells) indicate anaerobic cellular respiration.