Question

Primary germ layers are

• A. Trophoblast, ectoderm, mesoderm and endoderm
• B. Endoderm, trophoectoderm and trophomesoderm
• C. Trophomesoderm and trophoectoderm
• D. Ectoderm, mesoderm and endoderm.

Answer 1

The correct option is D Ectoderm, mesoderm and endoderm.

After implantation of the embryo into the uterus, the embryo differentiates into germ layers. These germ layers are an outer layer ectoderm, inner layer endoderm and a middle layer of mesoderm that appears later in between ectoderm and endoderm.

So, the correct answer is 'Ectoderm, mesoderm and endoderm'.