ch .4Q. All vertebrates are chordates but all chordates are not verteb

1.	ch .4Q. All vertebrates are chordates but all chordates are not vertebrates ? Why ?
Answer» All chordates have notochord present in some stage of life. The difference between vertebrates and non-vertebrates is as follows: In vertebrates the notochord is present in the embryonic stage. This is replaced by a vertebral column during the adult stages.

Discussion