A person is finding it difficult to read a book up close but can see distant objects clearly.
(i) Describe the eye defect this person could have. (ii) Suggest how this eye defect can be corrected.
Write down the role of the iris in the eye.
Macular degeneration is an eye condition affecting central vision that can be treated using stem cells. The stem cells are harvested from the patient's own tissues rather than from a donor.
Suggest why using the patient's own stem cells is preferred in terms of the body's immune system response.
Practise OCR GCSE Biology Coordination and control – the nervous system with exam-style questions for Foundation and Higher tier. 79 questions, matched to the OCR GCSE Biology (J247) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.