Differentiates between chondicthyes and Osteichthyes.

Answer»

Chondrichthyes	Osteichthyes
(a) The endoskeleton is cartilaginous	(a) The endoskeleton is bony
(b) mouth is ventral	(b) mouth is terminal
(c) tail fin is heterocercal	(c) tail fin is homocercal
(d) The air bladder is absent	(d) The air bladder is present
(e) operculum is absent	(e) operculum is present
(f) fertilisation is internal	(f) fertilization is exter

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