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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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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