Before a drought, seedlings in a population had a range of root lengths. Seedlings with longer roots were more likely to survive the drought and produce seeds. When the seeds were grown, the offspring tended to have longer roots.
Which conclusion about this evidence is correct?
The evidence supports Darwin's theory because the drought caused individual plants to produce the root length they needed.
The evidence challenges Darwin's theory because plants with shorter roots were less likely to produce offspring.
The evidence supports Lamarck's theory because the offspring resembled the plants that produced the seeds.
The evidence supports Darwin's theory because plants with inherited longer roots were more likely to survive and reproduce.
71 exam-style questions on AQA GCSE Biology 6.3 The development of understanding of genetics and evolution, covering 6.3.1 Theory of evolution, 6.3.2 Speciation, 6.3.3 The understanding of genetics, 6.3.4 Evidence for evolution, 6.3.5 Fossils, 6.3.6 Extinction, and 6.3.7 Resistant bacteria. Each one has a worked solution and a mark scheme showing where the marks go.