Which of the following is the correct option | vedclass

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(A) The figure shows the germinal layers in animals. Figure $a$ shows two germinal layers: an outer ectoderm (bahyastar) and an inner endoderm (antast

Vedclass · Accepted Answer

$A$: Cnidaria,$B$: Platyhelminthes

Vedclass · Answer

(A) The figure shows the germinal layers in animals. Figure $a$ shows two germinal layers: an outer ectoderm (bahyastar) and an inner endoderm (antastar),with an undifferentiated layer called mesoglea (madhyashleshma) in between. This is characteristic of diploblastic animals,such as Cnidaria. Figure $b$ shows three germinal layers: an outer ectoderm,a middle mesoderm (madhyastar),and an inner endoderm. This is characteristic of triploblastic animals,such as Platyhelminthes and higher phyla. Therefore,$A$ represents diploblastic animals (Cnidaria) and $B$ represents triploblastic animals (Platyhelminthes).

Which of the following is the correct option for the animal groups corresponding to the organization shown in the figure?

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