About 8 Days After Fertilization, the Trophoblast Develops into Two

question 63

Multiple Choice

About 8 days after fertilization, the trophoblast develops into two layers in the region of contact between the blastocyst and endometrium. The layer known as the syncytiotrophoblast secretes enzymes that assist the embryo in penetrating the endometrium.

• A) both statements are true
• B) both statements are false
• C) the first statement is true; the second is false
• D) the second statement is true; the first is false