Which of the following phyla possess a post-a | vedclass

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(B) The presence of a post-anal tail is one of the fundamental diagnostic characteristics of the phylum $Chordata$. In chordates,this tail is present

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Chordata

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(B) The presence of a post-anal tail is one of the fundamental diagnostic characteristics of the phylum $Chordata$. In chordates,this tail is present at some stage of their life cycle,which helps in locomotion in aquatic forms. Other phyla like $Hemichordata$,$Echinodermata$,and $Mollusca$ do not possess a post-anal tail.

Which of the following phyla possess a post-anal tail at some stage of their life?

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