QUESTION: Define The Phylum Hemichordata.
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Hemichordate is a phylum of marine deuterostome animals, generally considered the sister group of the echinoderms. They appear in the Lower or Middle Cambrian and include two main classes: Enteropneusta (acorn worms), and Pterobranchia.
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floyam hemichordata it contain marines the two streams animals it contains hundred species....
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