Question

During gaseous exchange terrestrial mammals breathe in (A) air and breathe out carbon dioxide (B) oxygen and breathe out carbon dioxide (C)air with with a high concentration of oxygen and breathe out carbon dioxide (D)air with a high concentration of oxygen,and breathe out air with a high concentration of carbon dioxide

Answer 1

Answer: B

Step-by-step explanation:

Gaseous exchange requires the organism to take in oxygen in exchange for the waste product of carbon dioxide. The air we breathe is not high concentration of oxygen.