all vertebrates are chordates but all chordates are not vertebrates justify
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Notochord is a characteristic feature of all chordates. The members of sub-phylum - Vertebrata possess notochord during the embryonic stage. ... Thus, the absence of notochord in adult vertebrates suggest that all vertebrates are chordates but all chordates are not vertebrates.
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1. In some chordates the notochord is present only in the tail region of larvae.
2. In some other chordates, notochord is present through out the body length.
3. In some chordates, the notochord is replaced by vertebral column.
4. Due to this all chordates do not get classified in the same group.
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