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Which one is the most striking or (common) character of the vertebrates? 

A. Presence of notochord 

B. Presence of a triploblastic condition 

C. Presence of gill pouches 

D. Presence of coelom

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On the basis of the presence or absence of notochord Kingdom Animalia is divided into - non chordates and chordates. Vertebrata is included in chordates on the basis of the presence of a notochord, which in the adult stage is replaced by a Bony or cartilaginous vertebral column.

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