CAIE IGCSE Biology 14.2.8 Function of Rods and Cones Questions
Practise explaining how sensitive rods support night vision and how three cone types enable colour vision.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- Explain how greater rod sensitivity enables vision in low light and supports night vision.
- State that three cone types absorb different colours of light for colour vision.
- Apply greater rod sensitivity to explain the greater proportion of rods in nocturnal retinas.
CAIE IGCSE Biology 14.2.8 Function of Rods and Cones Questions question 1
The eye is adapted for focusing on near and distant objects.
Fig. 3.1 shows the parts of the eye involved in focusing. The eye is focused on a distant object.
Fig. 3.1
Rods and cones are the receptors in the retina of the eye.
Describe the functions of rods and cones in the eye.
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