What is the main difference between aerobic respiration and anaerobic respiration?
a. aerobic respiration requires oxygen to proceed, but anaerobic respiration does not.
b. aerobic respiration occurs during photosynthesis, but anaerobic respiration occurs during cellular respiration.
c. aerobic respiration produces atp, but anaerobic respiration does not.
d. aerobic respiration occurs only in living organisms, but anaerobic respiration occurs in nonliving organisms.

Answer;

A. Aerobic respiration requires oxygen to proceed, but anaerobic respiration does not.

Explanation;

-Aerobic respiration takes place in the mitochondria and requires oxygen and glucose, and produces carbon dioxide, water, and energy.

-Anaerobic respiration occurs when oxygen is not present. It consists of two steps. The first step, like aerobic respiration, is glycolysis, that produces ATP from the reactant glucose. The second step, fermentation, creates lactic acid or ethanol, depending on the type of fermentation.

-Both aerobic and anaerobic respirations are types of cellular respiration. It is clear both use glycolysis to produce ATP. Both generate energy by breaking down glucose, produce byproducts and depend on chemical reactions that are localized in the cytosol.

the sphincter muscles at the end of the digestive tract is the anus.

oxygen +1 most likely