Which option describes one of the characters of a chordate?
Correct answer: C. Postanal tail
- A. Gills
- B. Spiracles
- C. Postanal tail
- D. Chitinous exoskeleton
Explanation
The diagnostic characters of chordates are notochord, dorsal hollow nerve cord, pharyngeal slits and a post anal tail. The tail is the part of the body behind the cloacal or anal opening. It contains skeletal elements, muscles, blood vessels and nerves but no viscera. It provides much of the propulsive force in aquatic species. The tail is reduced or absent in the adults of some chordates.
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