Question

Which of the following germ layer is absent in the embryos of diploblastic animals ?

• A. Ectoderm
• B. Mesoderm
• C. Endoderm
• D. Mesoglea

Answer 1

The correct option is B Mesoderm

• Diploblastic animal embryos consist of two primary germ layers, the ectoderm, and endoderm.
• The mesoglea on the other hand is a layer of jelly-like non-cellular material between the external ectoderm and internal (endoderm) cellular layers of the body of a sponge or cnidarian (diploblastic animals).
• However, the triploblastic animals contain another germ layer called mesoderm apart from the other two layers.

So, the correct option is option B.