A common characteristic of all vertebrates is | vedclass

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(A) Vertebrates are a subphylum of Chordata characterized by the presence of a vertebral column. All vertebrates possess a cranium (brain box) that pr

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Presence of a cranium

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(A) Vertebrates are a subphylum of Chordata characterized by the presence of a vertebral column. All vertebrates possess a cranium (brain box) that protects the brain,which is why they are also known as Craniata. Option $A$ is correct because the presence of a cranium is a defining feature of all vertebrates. Options $B$,$C$,and $D$ are not universal characteristics; for example,cyclostomes lack jaws and paired appendages,and many vertebrates do not have a distinct neck or a body covered by an exoskeleton.

$A$ common characteristic of all vertebrates is $..........$

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