Chondrichthyes commonly show _______

Torpedo is commonly

Torpedo is commonly

Chondrichthyes and Osteichthyes

Assertion: Chondrichthyes swim constantly in water body to avoid sinking. Reason: In chondrichthyes, air bladder is not found.

Type of fertilisation in Chondrichthyes and osteichthyes is____

Type of fertilisation in Chondrichthyes and osteichthyes is____

Mutations are commonly

Differentiate between Chondrichthyes and Osteichthyes on the basis of scales and caudal fin.