Answer:
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.
Explanation:
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A group of similar cells organized to perform a particular function is a "tissue."
Answer:
The answer is ecliptic plane
Explanation:
I got it right on the test
Cotton candy is made out of sugar
