A student reads a book. She then looks up at a bus a long way away.
The lens in her eye changes shape so that she can see the bus clearly.
Describe how the eye changes so that she can see the distant bus clearly.
The student looks back at her book.
Explain why the lens must change shape again.
As people get older, the lens becomes less elastic.
Suggest why many older people find it difficult to read a book without glasses.
135 exam-style questions on OCR GCSE Biology 3.1 Coordination and control – the nervous system, covering 3.1.1 Structure of the nervous system, 3.1.2 Coordinated response, 3.1.3 The reflex arc, 3.1.4 Structure of the eye, 3.1.5 Defects of the eye, 3.1.6 Structure and function of the brain, 3.1.7 Difficulties of investigating brain function, and 3.1.8 Limitations in treating nervous system damage. Each one has a worked solution and a mark scheme showing where the marks go.