Question

Why do embryos develop longer inside the mother's body?

A.Mammals develop more slowly because they are bigger.
B.Embryos are more fragile because they are smaller than amphibian eggs.
C.Embryos do not have eggshells that will protect them from the outside environment.
D.The embryos of all mammals are larger than animals the lay eggs.

Answer 1

Embryos develop longer inside the mother's body because they lack protective eggshells like amphibian eggs. Mammals have amniotic eggs and placenta, which provide protection and nourishment for the embryo.

Step-by-step explanation:

The reason embryos develop longer inside the mother's body is because they lack protective eggshells like amphibian eggs. Instead, mammals have amniotic eggs, which have a leathery or hard calcium covering that provides protection to the growing embryo. Additionally, mammals have placenta to nourish the fetus and protect it from the mother's immune system, allowing for a longer period of growth and development before birth.