Across
- 4. Discovered the process of natural selection
- 5. The mechanism used for organisms to change based on their environment
- 6. A gene passed down from parents
- 8. The bird Darwin studied
- 9. Darwin noticed these had different sizes and shapes for food
- 11. The type of selection that favors extreme traits over common ones
- 12. The process by which inherited traits make it easier to thrive
Down
- 1. Remains of a once-living organism that can tell us about the past
- 2. Islands where Darwin studied
- 3. Different members of a population have individual
- 7. The idea that gene distribution changes over time
- 10. An idea that explains several phenomena at once