Answer:
The reason fat cells grow bigger could be because they live longer and have important long-term functions.
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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E. Caomouflage is what prey use to blend into their surroundings.
