Part 4: The Continuity of Life: Evolution Tutorials Chapter 17. What types of scientific evidence support evolution? Chapter 18. How do populations change genetically away from the Hardy-Weinberg equilibrium? Chapter 19. What prevents closely related species from interbreeding? Chapter 20. How has life changed on Earth throughout geological time? Chapter 21. How have human ancestors and relatives changed over time?   Simulation How does natural selection cause evolution? Copyright ©2002 Thomson Learning, Inc.