what is phylum chordata?
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any of a phylum (Chordata) of animals having at least at some stage of development a notochord, dorsally situated central nervous system, and gill slits and including the vertebrates, lancelets, and tunicates.
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Explanation:
Chordata refers to a large phylum of animals that includes vertebrates as well as lancelets and sea squirts. Several well-known vertebrates, such as reptiles, fishes, mammals, and amphibians are included in the phylum Chordata.
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