Scientists used to classify animals into groups such as 'animals that fly' and 'animals that swim'. Bats and birds were put in the same group. Today, bats are classified as mammals. Which statement explains why?
Bats were found to fly in a different way from most birds.
Bats were found to eat different food from most birds.
Bats share more features and DNA with mammals than with birds.
Bats were found to be active at night instead of in the day.
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.