Across
- 2. Well tested idea that explains a range of observations
- 4. Small changes over time
- 5. Can Mate and reproduce
- 10. Differences in the same species
- 11. Species fight for food
- 12. organisms with desired traits are bred
- 17. Natures way of choosing
Down
- 1. Darwin's Book
- 3. Similar structures that species inherit from an ancestor
- 6. Can lead to natural selection
- 7. Change over time
- 8. Person who studies the natural world
- 9. Small changes that add up to major changes
- 13. trait that helps an organism survie
- 14. Ship that sailed for 5 years
- 15. Species change to new species
- 16. Preserved remains of an organism