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13-01-2020
Biology

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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

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13-01-2020

Answer: B

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.

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