6. what is the primary distinguishing factor between anaerobic and aerobic respiration? group of answer choices 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 respiration only takes place in yeast and bacteria whereas aerobic respiration always takes place in higher organisms such as plants and animals.