In Order to Adapt to Thhigh Oxygen Demands of Flight

question 3

Multiple Choice

In order to adapt to thhigh oxygen demands of flight, birds

• A)have simple lungs.
• B)have air sacs connected to their lungs.
• C)use carbon dioxide for respiration.
• D)can diffuse oxygen through the roof of their mouth.
• E)have simple lungs, and can diffuse oxygen through the roof of their mouth.

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