All chordates are vertebrate but all vertebrates are not chordates

1.	All chordates are vertebrate but all vertebrates are not chordates
Answer» The characteristic features of the phylum, Chordata, include the presence of a notochord and paired pharyngeal gill slits. In sub-phylum Vertebrata, the notochord present in embryos gets replaced by a cartilaginous or bony vertebral column in adults. Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates.

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