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Question
Animals with notochord are called
Options:
A .  Vertebrates
B .  Chordates
C .  Hemichordates
D .  Both A and B
Answer: Option B
:
B
All animals that possess a notochord are called chordates. Vertebrata is a sub-phylum under Phylum Chordata and are hence, "vertebrate" is not synonymous to "chordate". Vertebratespossess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult.

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