In placental mammals, implantation would fail if cells of the _______ failed to express adhesion molecules.
A) inner cell mass
B) trophoblast
C) zona pellucida
D) embryonic ectoderm
E) placenta

Question

Quizplus · Accepted Answer

In placental mammals, implantation occurs when the trophoblast cells of the blastocyst attach and penetrate the endometrial lining of the uterus. This process is dependent on the expression of adhesion molecules on the surface of trophoblast cells, which allow them to bind to receptors on the uterine cells. If the trophoblast cells fail to express these molecules, implantation will fail. The other choices are not directly involved in the process of implantation.

In Placental Mammals, Implantation Would Fail If Cells of the _______