Question

The outer layer of the blastocyst, which forms the ectoderm is called as

• A. Cnidoblast
• B. Germinal vesicle
• C. Trophoblast
• D. Amnion

Answer 1

The correct option is C Trophoblast

Cnidoblast is the cell in which a nematocyst is developed.
Germinal vesicle is the huge nucleus in the immature oocyte.
Trophoblast is the outer layer of the blastocyst. It forms trophectoderm and helps in the implantation of the embryo.
Amnion is the membrane forming the fluid-filled cavity, that encloses the embryo.

So, the correct answer is option C.