Question Detail
Question
Which of the following is *not* a defining feature of Phylum Chordata at some stage of development?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The defining features of Phylum Chordata include possessing a notochord, dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail. An exoskeleton of chitin is characteristic of arthropods, not chordates.
Hint
Consider the characteristics that define vertebrates and their closest relatives.