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Question
What do craniates have that earlier chordates did not have?
What do craniates have that earlier chordates did not have?
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Solution
The correct option is D Skull
Craniates are vertebrates in which the brain is covered and protected by a bony box called cranium, which is a part of the skull. The earliest chordates are protochordate and they lack a skull. All chordates have a brain, a nerve cord and a tail.
Craniates are vertebrates in which the brain is covered and protected by a bony box called cranium, which is a part of the skull. The earliest chordates are protochordate and they lack a skull. All chordates have a brain, a nerve cord and a tail.
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