Most fish do not sink in water because of the presence of:
I. swim bladder
II. air bladder
III. air sacs
IV. air in spongy bones
A. I and II are correct
B. II and III are correct
C. III and IV are correct
D. I, II, III and IV are correct
Answer: Option A
Solution (By Examveda Team)
Fishes have a swim bladder or air bladder which helps them to remain buoyant without sinking in water. They are present in the body cavity.This Question Belongs to General Knowledge >> Biology
According to me 1,2,3 all are correct.
Air sacs also help in sinking