Three species of beetle are called L, M and N.
Species L and M are currently placed in the same genus because the adults of both species lack wings. Species N has wings and is placed in a different genus.
Scientists collected further evidence by comparing species M and N with species L.
| Species compared with L | Percentage of bases the same in DNA region 1 | Percentage of bases the same in DNA region 2 | Percentage of bases the same in DNA region 3 | Number of internal structural characteristics shared with L |
|---|---|---|---|---|
| M | 96.8 | 97.1 | 96.9 | 5 |
| N | 98.2 | 98.4 | 98.3 | 8 |
Evaluate the conclusion that species L and M should remain in the same genus.
Use all the evidence in the table and your knowledge of classification.
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.