The body is segmented in:

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(B) Segmentation,also known as metamerism,is a characteristic feature of the phylum $Annelida$. In $Annelida$,the body is externally and internally di

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Annelida

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(B) Segmentation,also known as metamerism,is a characteristic feature of the phylum $Annelida$. In $Annelida$,the body is externally and internally divided into segments called metameres. $Coelenterata$ (Cnidaria) are diploblastic and lack true segmentation. $Porifera$ are asymmetrical and lack organ-level organization. $Mollusca$ are generally unsegmented,although some show secondary modifications.

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