A) Mammary glands, hair and gill slits
B) Notochord, gill slits and dorsal tubular nervous system
C) Notochord, scales and dorsal tubular nervous system
D) Gill slits, vertebral column and notochord
Correct Answer: B
Solution :
Presence of notochord, Dorsal tubular nerve cord, Pharyngeal gill clefts, post anal tail, RBCs and hepatic portal system is distinguising feature of chordates.
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