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Neural Control and Coordination

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Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
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  1. Function of iris is to
    1. move lens forward and backward
    2. refract light rays
    3. bring about movements of eye lids
    4. alter the size of pupil.
Correct Option: D

Iris controls the size of pupil by contracting or relaxing of its circular muscles. It controls the amount of light entering in eye.


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