Q. The function of iris in the eyes of frog is to
A) Alter the size of pupil
B) Move nictitating membrane
C) Refract light rays
D) Move the lens forward and backward
Explanation
The smooth muscles found in iris, regulate the amount of light entering the eye ball by varying the size of the pupil.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.