Question Detail
Question
The exterior of a blastocyst is known as
Correct Answer
Option B is the correct answer.
Detailed Explanation
The trophoblast is the outer layer of cells of the blastocyst (a mammalian blastula). It is responsible for implanting the embryo into the uterine wall and later contributes to the formation of the placenta.
Hint
This outer layer of cells helps the embryo burrow into the uterus and forms part of the placenta.