Birds Are Descended from Species That Laid Eggs in Water

Multiple Choice

Birds are descended from species that laid eggs in water. It could be argued that embryos of birds still develop in water because ________.

A) the shell keeps the embryo from drying out
B) the amnion encases each embryo in water
C) the chorion, allantois, and yolk sac provide embryos with nutrients and waste disposal
D) the amnion protect the embryo in the same way that a seed coat protects plant embryos of flowering plants