50 points for this one biology question if you get it right you get !

what is the primary distinguishing factor between anaerobic and aerobic respiration?

anaerobic respiration uses fermentation whereas aerobic respiration uses glycolysis, the krebs cycle, and the electron transport chain.

aerobic respiration gives off carbon dioxide whereas anaerobic respiration gives off oxygen.

anaerobic respiration takes place without the use of oxygen whereas aerobic respiration uses oxygen at the end of the electron transport chain.

anaerobic respiartion only takes place in yeast and bacteria whereas aerobic respiration always takes place in higher organisms such as plants and animals.

The answer to your question is the last one.

Explanation:

Anaerobic respiration uses fermentation whereas aerobic respiration uses glycolysis, the Krebs cycle, and the electron transport chain.

Both kinds of respiration uses glycolisis after this process, anaerobic respiration goes to fermentation and aerobic respiration goes to the Krebs cycle, so this answer is incorrect.

Aerobic respiration gives off carbon dioxide whereas anaerobic respiration gives off oxygen.

This answer is incorrect because aerobic respiration gives off oxygen but anaerobic respiration gives off different molecules like ethanol, lactic acid or acetic acid.

Anaerobic respiration takes place without the use of oxygen whereas aerobic respiration uses oxygen at the end of the electron transport chain.

I think this option is correct but is not the primary distinguishing factor between anaerobic and aerobic respiration, so this option is incorrect.

Anaerobic respiartion only takes place in yeast and bacteria whereas aerobic respiration always takes place in higher organisms such as plants and animals.

In my opinion, this option is correct it describes one of the primary factors that distinguish between aerobic and anaerobic respiration.