A student sees the outline of a flower in dim light but cannot distinguish its colour.
Which statement explains this observation?
Cone cells respond in dim light but do not distinguish colours.
Rod cells respond in dim light and distinguish different colours.
Cone cells respond in dim light and distinguish different colours.
Rod cells respond in dim light but do not distinguish colours.
42 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.