Molecular phylogenetics has changed the way that some organisms are classified. Which statement explains why classification using DNA sequencing can be more reliable than classification using observable features?
Similar features can evolve in unrelated organisms in similar environments.
DNA sequencing can only be carried out on organisms that are still alive.
Observable features are not affected by the genes that are inherited.
Organisms with similar DNA always look very similar to each other.
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.