Question
Biology Question on excretory system
Presence of air bladder, cycloid scales and terminal mouth are the characteristic features of which class?
A
Chondricthyes
B
Osteicthyes
C
Amphibia
D
Cyclostomata
Answer
Osteicthyes
Explanation
Solution
Osteichthyes or bony fishes have terminal mouth and sac-like outgrowth known as swim bladder or air bladder which help them to maintain balance and to swim up and down. The exoskeleton of these fishes comprises of cycloid, ctenoid or ganoid scales.