Animal KingdomHard
Question
Characters of which group are present in all chordates in some stage or the other of their life cycle?
Options
A.Gill clefts, vertebral column and notochord
B.Mammary glands, hairs and gill clefts
C.Notochord, scales and dorsal tubular nervous system
D.Notochord, gill clefts and dorsal tubular central nervous system