A field guide groups flowering plants by the colour of their flowers. Which is a disadvantage of this system compared with a natural classification system?
The groups are based on features that are difficult to see in the field.
The groups can only be identified by sequencing the DNA of the plants.
The plants in one group may not share a recent common ancestor.
The plants in one group must all be able to interbreed with 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.