A population of plants has two inherited variants for tolerance to low water availability. At the start of a dry period, there are 100 plants of each variant.
| Inherited variant | Plants surviving the dry period | Mean number of seeds produced per surviving plant |
|---|---|---|
| More tolerant | 72 | 18 |
| Less tolerant | 30 | 12 |
Use the data to explain which variant is likely to become more common in later generations.
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.