During a laboratory examination of eye tissue, two cell types are identified as rods and cones.
Which statement gives the function of these cells?
They contract and change the size of the pupil.
They carry electrical impulses from the eye to the brain.
They refract light and bring it to a focus.
They detect light and convert it into electrical impulses.
102 exam-style questions on Edexcel GCSE Biology 2.4 The eye, covering 2.4.1 Structure and function of the eye and 2.4.2 Eye defects and their correction. Each one has a worked solution and a mark scheme showing where the marks go.