A population of wild plants contains plants with long roots and plants with short roots. Root length is inherited.
Scientists grew equal numbers of each type in dry soil. They recorded survival and seed production.
| Root length | Percentage of plants that survived | Mean number of seeds produced by each surviving plant |
|---|---|---|
| long | 76 | 48 |
| short | 34 | 21 |
A scientist predicts that repeated dry summers will increase the frequency of the allele for long roots in this population.
Explain how the results support this prediction.
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.