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Why do embryos develop longer Inside the mother's body?
Mammals develop more slowly because they are bigger.
Embryos are more fragile because they are smaller than amphibian eggs.
Embryos do not have eggshells that will protect them from the outside environment.
The embryos of all mammals are larger than animals that lay eggs.
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Why do embryos develop longer Inside the mother's body?
Mammals develop more slowly because they a...
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