how balangnoglossus may be derived from
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They were supposed to possess the notochord, the gill-slits, and the dorsal tubular nerve cord which are three unique characters of the chordates. (1) Notochord: Bateson called the buccal diverticulum of Balanoglossus as notochord for the following reasons: (a) It is derived from the dorsal region of the endoderm.
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