A group of squirrels lived in one large forest. A new motorway was built through the forest. The motorway separated the squirrels into two groups, which could no longer meet.
Give the word used to describe two populations that have been separated in this way.
The two groups of squirrels now live in different conditions. Describe what will happen to the two groups over many generations.
After a very long time, scientists find that the two groups can no longer breed together to produce fertile offspring. Give the term used to describe the two groups now.
40 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.