Scientists survey three areas of rock formed at the same time in similar lake environments.
| Area | Rock exposed and examined (%) | Evidence about the rock | Fossils of organisms with hard parts found | Fossils of soft-bodied organisms found |
|---|---|---|---|---|
| P | 70 | The rock has not been strongly heated or compressed. | 84 | 3 |
| Q | 65 | The rock has been strongly heated and compressed. | 9 | 0 |
| R | 8 | The rock has not been strongly heated or compressed. | 7 | 0 |
Explain which area is likely to give the most complete fossil record. Use the information in the table and explain why the record from this area would still be incomplete.
122 exam-style questions on OCR GCSE Biology 5.2 Natural selection and evolution, covering 5.2.1 Genetic variation within a population, 5.2.2 Developments in classification systems, 5.2.3 How evolution occurs through natural selection, 5.2.4 Evolution as change over time, 5.2.5 Evidence for evolution, and 5.2.6 Darwin and Wallace. Each one has a worked solution and a mark scheme showing where the marks go.