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The two membranes pull apart a little and create a small pocket or sack of air. As the developing bird grows, it breathes in oxygen from the air sack and exhales carbon dioxide. Several thousand microscopic pores all over the surface of the egg allow the CO2 to escape and fresh air to get in.
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Carbon dioxide (CO2) is formed from one carbon atom bonded to two oxygen atoms. Therefore, carbon dioxide is a compound!
Answer:
It pulls the moon to the earth.
Explanation:
