Final answer:
Alcohol fermentation produces ethanol and carbon dioxide, while lactic acid fermentation produces lactic acid. The production of carbon dioxide is unique to alcohol fermentation.
Step-by-step explanation:
Alcohol fermentation and lactic acid fermentation are two types of fermentation that occur in cells without oxygen.
Alcohol fermentation produces ethanol and carbon dioxide. This type of fermentation is carried out by yeast and some bacteria. It is used to make products such as bread, wine, and biofuels.
Lactic acid fermentation produces lactic acid. It occurs in muscle cells during intense exercise when there is not enough oxygen available. Lactic acid fermentation does not produce carbon dioxide.