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What are vertebrates? Why are these call...

What are vertebrates? Why are these called craniates?

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### Step-by-Step Solution: 1. **Definition of Vertebrates**: - Vertebrates are animals that belong to the subphylum Vertebrata within the phylum Chordata. They are characterized by the presence of a notochord that develops into a vertebral column (backbone) in adults. 2. **Characteristics of Vertebrates**: - Vertebrates possess a notochord during some stage of their life cycle. - They have a dorsal nerve cord, which is a key feature of chordates. ...
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