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<u><em>Answer: Formation differs in that protostomes form a coelom when the mesoderm splits, whereas the deuterostomes form a coelom when mesoderm cells combine, resulting in the body cavity. This formation occurs during the gastrula, or three-layered structure stage of development.</em></u>
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<u><em>Explanation:</em></u>
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Hunt for food, gather resources, protecc, and attacc
1. B. 2.B 3.C.
1. Fossils is a main supporter of the evolution theory
2. Evolution
3. Lack oh adaptation risk death
