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Q:Q: Vertebrates evolved from primitive forms of which creature?   Read this paragraph and choose the correct option from the provided answers:  Vertebrates evolved from primitive chordates. This occurred about 550 million years ago. The earliest vertebrates may have been jawless fish, like the hagfish in Figure below . Vertebrates evolved a backbone to replace the notochord after the embryo stage. They also evolved a cranium , or bony skull, to enclose and protect the brain.   Choices:  - arthropods  - humanoids  - cephalopods  - chordates   A:
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user
Vertebrates evolved from primitive forms of chordates.
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