A common characteristic of all vertebrates without exception is:
Correct answer: D. The presence of well developed skull
- A. The division of body into the head, neck, trunk and tail.
- B. The body covered with an exoskeleton
- C. The possession of two pairs of functional appendages
- D. The presence of well developed skull
Explanation
The subphylum vertebrata or craniata has a well developed central nervous system that is differentiated into the brain and spinal cord. Their brain is protected by a brain box called cranium, and hence they are also called craniata.
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