In the period of prenatal development that occurs from two to eight weeks after conception, the blastocyst attaches to the uterine wall. During this period, the mass of cells is referred to as a(n)
A) trophoblast.
B) follicle.
C) fetus.
D) embryo.

Question

Quizplus · Accepted Answer

During the period of prenatal development that occurs from two to eight weeks after conception, the mass of cells is referred to as an embryo. The blastocyst attaches to the uterine wall and begins to develop into a more complex organism.

In the Period of Prenatal Development That Occurs from Two