50da6ae4-why-is-the-placenta-considered-a-critical-adaptation-in-the-evolution-o

Question

Why is the placenta considered a critical adaptation in the evolution of placental mammals?

Accepted Answer

It facilitates efficient nutrient and waste exchange between mother and fetus.

Answer

It provides a rigid structure for fetal protection.

Answer

It allows for external incubation of embryos.

Answer

It promotes rapid growth of mammary glands.