Biology 5090 · O Level · Mammalian sense organs

Mammalian sense organs — practice question

The diagram shows a cross-section of an eye. Which part acts as the receptor for the stimulus that causes the pupil to change size?

  • AA
  • BB
  • CC
  • DD

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI