Which of the following is found in all major groups of vertebrates?

Question

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The anterior skull is a fundamental characteristic found in all major groups of vertebrates, serving as a protective case for the brain and the primary sensory organs. This feature is universal among vertebrates, unlike internal bony skeletons (absent in cartilaginous fishes), paired appendages (not present in some fish), jaws (absent in agnathans), and teeth (which can vary greatly or be absent in some birds and turtles).

Which of the Following Is Found in All Major Groups