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(A) The given diagram illustrates the two types of germ layers in animals:$(a)$ represents a diploblastic animal,where the body is composed of two ger

Vedclass · Accepted Answer

$(a) \rightarrow$ Diploblastic,$(b) \rightarrow$ Triploblastic

Vedclass · Answer

(A) The given diagram illustrates the two types of germ layers in animals:$(a)$ represents a diploblastic animal,where the body is composed of two germ layers: an external ectoderm and an internal endoderm,with an undifferentiated mesoglea in between.$(b)$ represents a triploblastic animal,where the developing embryo has a third germ layer,the mesoderm,in between the ectoderm and endoderm.Diploblastic animals include phyla like Coelenterata (Cnidaria) and Ctenophora.Triploblastic animals include phyla from Platyhelminthes to Chordata,such as Annelida,Mollusca,Arthropoda,etc.Therefore,option $(a)$ represents diploblastic organization and $(b)$ represents triploblastic organization.

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