Which of the following is a characteristic of | vedclass

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(D) The phylum $Chordata$ is characterized by the presence of a notochord,a dorsal hollow nerve cord,and paired pharyngeal gill slits at some stage of

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Post-anal tail

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(D) The phylum $Chordata$ is characterized by the presence of a notochord,a dorsal hollow nerve cord,and paired pharyngeal gill slits at some stage of their life cycle. Additionally,they possess a post-anal tail. While pharyngeal gill slits and a post-anal tail are diagnostic features of chordates,the post-anal tail is specifically a unique feature that is entirely absent in non-chordates. Although pharyngeal gill slits are also characteristic,the post-anal tail is the most distinct feature listed that is absent in all non-chordates.

Which of the following is a characteristic of chordates that is $NOT$ found in non-chordates?

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