Which phylum exhibits the first appearance of | vedclass

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(B) Triploblastic organization refers to the presence of three germ layers: ectoderm,mesoderm,and endoderm during embryonic development.Phylum $Ctenop

Vedclass · Accepted Answer

Platyhelminthes

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(B) Triploblastic organization refers to the presence of three germ layers: ectoderm,mesoderm,and endoderm during embryonic development.Phylum $Ctenophora$ and $Cnidaria$ are diploblastic,meaning they have only two germ layers.Phylum $Platyhelminthes$ (flatworms) is the first group in the animal kingdom to exhibit triploblastic organization,where a third layer,the mesoderm,is present between the ectoderm and endoderm.Therefore,the correct option is $B$.

Which phylum exhibits the first appearance of triploblastic organization?

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