In which animals is the germinal layer organi | vedclass

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(A) Figure $A$ represents diploblastic organization,where two germinal layers (ectoderm and endoderm) are present with an undifferentiated mesoglea in

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Planaria

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(A) Figure $A$ represents diploblastic organization,where two germinal layers (ectoderm and endoderm) are present with an undifferentiated mesoglea in between. This is characteristic of Phylum Cnidaria (e.g.,Jellyfish,Sea anemone).Figure $B$ represents triploblastic organization,where three germinal layers (ectoderm,mesoderm,and endoderm) are present. This is characteristic of animals from Phylum Platyhelminthes to Chordata.Among the given options,Planaria is a member of Phylum Platyhelminthes,which is triploblastic. Spongilla (Porifera),Jellyfish (Cnidaria),and Sea anemone (Cnidaria) are either diploblastic or lack true tissue organization.

In which animals is the germinal layer organization shown in figure $B$ observed?

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