Question

Cartilaginous fishes are characterized by the presence of

• A. Terminal mouth
• B. Ventral mouth
• C. A homocercal tail
• D. A protocercal tail

Answer 1

Answer: (B)

Ventral mouth

Protostomes are the animals in which mouth is formed from the first developmental opening and hence form ventrally. Cartilaginous fishes are marine animals having streamlined body and ventrally located mouth as they are protostomes and belongs to class Chondrichthyes.

So, the correct answer is option B.