vertebrates
vertebrates
vertebrates
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Lampreys<br />
• Lampreys (Petromyzontida) represent the<br />
oldest living lineage of <strong>vertebrates</strong><br />
• They are jawless <strong>vertebrates</strong> inhabiting<br />
various marine and freshwater habitats<br />
• They have cartilaginous segments<br />
surrounding the notochord and arching<br />
partly over the nerve cord