Across
- 4. natural selection is ____ of the fittest
- 5. any version of a trait that increases chances of survival
- 7. individuals best suited for their environments will survive and reproduce
- 8. preserved remains of ancient organisms
- 10. Darwin was always fascinated by biological ____
- 11. Thomas ____ was a British economist that studied the limitations of human population growth
- 13. An organism must ____ for its traits to be passed on
- 15. the ship on which Darwin sailed
- 17. the islands on which Darwin observed tortoises and finches
Down
- 1. Alfred ___ observed similar patterns to Darwin in Indonesia
- 2. Jean-Baptiste ____ believed that organisms change during life and pass on those acquired traits
- 3. ____ selection is when humans breed plants and animals for desireable traits
- 6. in order for natural selection to occur, there must be ___ between individuals
- 9. a measure of an organism's chance of surviving and reproducing
- 12. the study of rocks, fossils and the age of the Earth
- 14. a species that no longer exists in nature is ____
- 16. change of organisms over time