* ATP: While it produces significantly less ATP than aerobic respiration, it still generates some energy for the cell.

* Lactic acid (in animals and some bacteria): This is a byproduct of anaerobic respiration in animals and some bacteria. Lactic acid buildup can cause muscle fatigue.

* Ethanol (in yeast and some bacteria): Yeast and certain bacteria produce ethanol as a byproduct of anaerobic respiration. This process is used in the production of alcoholic beverages.

* Carbon dioxide (in all organisms): Anaerobic respiration also releases carbon dioxide as a waste product.

Key Differences from Aerobic Respiration:

* Oxygen: Anaerobic respiration does *not* require oxygen.

* ATP Production: Anaerobic respiration produces far less ATP (about 2 ATP per glucose molecule) compared to aerobic respiration (about 38 ATP per glucose molecule).

* Byproducts: Anaerobic respiration produces byproducts like lactic acid or ethanol, while aerobic respiration primarily produces water and carbon dioxide.