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IMSO 2006 Science – Taiwan Selection First Round Theory Question 23

IMSO Science · IMSO 2006 Science – Taiwan Selection First Round Theory

Question 23

The pupil of a cat’s eye is,
  1. open widely in daylight.
  2. open widely in night.
  3. narrows to a slit width in night.
  4. open widely both in daylight and in night.