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WAEC Biology 2002 Question 23

Question 23

Sense Organs

When a person moves from a darkroom into bright light, the pupil becomes

  1. A.red
  2. B.larger
  3. C.white
  4. D.smaller.
Show the answer and explanation

Answer: D (smaller.)

Explanation

In bright light the circular muscles of the iris contract, making the pupil smaller so less light enters and the retina is protected.