Question

In which animals, endoskeleton is made up bones ?

• A. Labeo – catla
• B. Labeo – Ray fish
• C. Shark – Ray fish
• D. Shark – sea horse

Answer 1

The correct option is A Labeo – catla

Labeo and Catla are bony fishes (Osteichthyes).
The endoskeleton of shark is cartilaginous (Chondrichthyes) throughout its life. The endoskeleton of sea horse is cartilaginous in the embryonic stage, but in the adult stage, it is replaced by bones. Thus, sea horse has bony endoskeleton.

So, the correct answer is- option a.