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Chordata/Vertebrata

Why all verte...

Question

Why all vertebrates are chordates but all chordates are not considered as vertebrates?

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Solution

The members of Vertebrata possess notochord during embryonic development. Thus, all vertebrates are chordates. However, the notochord gets replaced by a cartilaginous or bony vertebral column in the adult. Thus, all chordates are not vertebrates.

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Chordates which possess backbone are called__(vertebrates/invertebrates).

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