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Question

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

A
Ectoderm
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B
Mesoderm
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C
Endoderm
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D
Mesoglea
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Solution

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.

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