Question

Which group tells the three unifying characteristics of chordates?
a. dorsal nerve cord ,radial symmetry ,tree layers of cells
b. notochord, gill slits, dorsal nerve cord
c. water vascular system, backbone, gill slits
d. exoskeleton, notochord, lungs​

Answer 1

Answer:

You should to consult with bio student......

Answer 2

Answer:

notochord, gill slits, dorsal nerve cord