Which of the following is NOT a feature that is found exclusively among all vertebrates? a. notochord b. pharyngeal gill slits c. four legs d. post-anal tail e. dorsal nerve cord

Which of the following is NOT a feature that is found exclusively among all vertebrates?

a.    notochord

b.    pharyngeal gill slits

c.    four legs

d.    post-anal tail

e.    dorsal nerve cord

Ans: four legs