Question

Where does the oxygen that is used during cellular respiration in animals

come from?
O A. Air that is breathed in
O B. Water molecules in a cell's cytoplasm
O C. Carbon dioxide molecules in food and drink
O D. ATP molecules in a mitochondrion
SUBMIT​

Answer 1

Explanation:

Air that is breathed in

Answer 2

A. Air that is breathed in :)