An important characteristic that Hemichordates share with Chordates is
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Absence of notochord
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Ventral tubular nerve cord
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Pharynx with gill slits
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Pharynx without gill slits
C.
Pharynx with gill slits
Pharyngeal gill slits are present in hemichordates as well as in chordates. Notochord is present in chordates only. Ventral tubular nerve cord is characteristic feature of non-chordates