Question

Hemichordata are not regarded as true chordates because

Answer 1

Answer:

Due to the absence of a post-anal tail or notochord.

Explanation:

The Hemichordates doesn't have notochord or a post-anal tail in their body, which is a distinguishing feature in the Chordates. The Hemichordates were first placed among the Chordates but due to the absence of any type of backbone or chord, these were removed from the group.

The Hemichordates are exclusively marine animals and have a triploblastic body. They are also called as Acorn Worms. Their body is segmented and is diploblastic.

Answer 2

EXPLANATION:

• Hemichordata was earlier placed in the same Phylum as that of the chordates. However later and they were removed. This is because of two reasons.  

• Chordates have post anal tail present in most of the species however they were absent in the hemichordata.  

• In addition to this hemichordata have notochord present but the notochord does not lie in the entire body and is incomplete which is complete in case of the true chordates.

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