Which of the Following is a Characteristic of All Chordates

Question

Which of the following is a characteristic of all chordates at some point during their life cycle?
A)jaws
B)post-anal tail
C)four-chambered heart
D)vertebrae

Accepted Answer

A post-anal tail is present in all chordates at some point during their life cycle. Jaws, a four-chambered heart, and vertebrae are not present in all chordates.