Which statement about trophoblast cells is true?
A) They are capable of producing monozygotic twins.
B) They are derived from the hypoblast of the blastocyst.
C) They are endodermal cells.
D) They secrete proteolytic enzymes.
E) They prevent the zona pellucida from attaching to the oviduct.

Question

Quizplus · Accepted Answer

Trophoblast cells are derived from the outermost layer of cells in the blastocyst, not the hypoblast.

Answer: D 
 Trophoblast cells secrete proteolytic enzymes that break down the zona pellucida, allowing the embryo to implant into the uterine wall.

Therefore, the correct answer is B and D.

Which Statement About Trophoblast Cells Is True