A print technician receives the following results from a vision assessment.
| Function tested | Result |
|---|---|
| rod-cell response | normal |
| red-sensitive cone-cell response | absent |
| green-sensitive and blue-sensitive cone-cell responses | normal |
| focusing on near and distant objects | normal |
The technician completes four tasks.
| Task | Activity |
|---|---|
| P | separating red labels from green labels under bright lighting |
| Q | locating a grey paper roll in a dim storeroom |
| R | reading a nearby batch code and then a distant clock |
| S | separating blue labels from green labels under bright lighting |
Which task is most likely to be difficult for the technician?
Task P: separating red labels from green labels under bright lighting
Task R: reading a nearby batch code and then a distant clock
Task S: separating blue labels from green labels under bright lighting
Task Q: locating a grey paper roll in a dim storeroom
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.