In which group of animals is the notochord re | vedclass

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(A) The phylum $Hemichordata$ was previously considered a subphylum under $Chordata$. However,it is now placed as a separate phylum. The animals in th

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Hemichordata

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(A) The phylum $Hemichordata$ was previously considered a subphylum under $Chordata$. However,it is now placed as a separate phylum. The animals in this group possess a rudimentary structure in the collar region called the $stomochord$,which is often compared to the notochord. In $Hemichordates$,this structure is restricted to the anterior part of the body,specifically the proboscis region. Therefore,the correct group is $Hemichordata$.

In which group of animals is the notochord restricted to the anterior part of the body,known as the proboscis?

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