About a week after conception, the outer layer of the multiplying cells forms a shell that will become the _____.
A) placenta
B) umbilical cord
C) embryo
D) infant

Question

Quizplus · Accepted Answer

The outer layer of cells that forms about a week after conception becomes the placenta, which serves as a vital organ for the developing fetus by facilitating nutrient and waste exchange with the mother's bloodstream. The umbilical cord connects the fetus to the placenta, and the embryo refers to the developing organism itself during the first eight weeks of gestation. The infant is the term used for a newborn baby after birth.

About a Week After Conception, the Outer Layer of the Multiplying