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Q.

Is it true that the iris controls the amount of light entering the eye?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
The human eye consists of many functional parts. Every part is designed for a specific function. e.g. Lens is the part of the eye through which light enters the eye. Similarly, the retina is that part of the eye on which the image of an object is formed.
The iris and the pupil are designed to regulate the amount of light that enters the eye. The pupil is the small opening which allows light through the eye. Iris acts like a stopper, controlling the amount of light entering the human eye.
 
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