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Placental Mammals Nourish Developing Embryos with the Maternal Circulation and the Placenta

Question 71

Multiple Choice

Placental mammals nourish developing embryos with the maternal circulation and the placenta. Because of this, they have _______ than animals that develop within shelled eggs.


A) less endoderm
B) less yolk
C) more yolk
D) less amnion
E) more mesoderm

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