Across
- 4. the movement of genes from one population into another-resulting in greater genetic variety
- 5. the idea that the best adapted organisms survive and reproduce to spread their genes
- 6. the idea that related species will have genetic similarities
- 7. structures with different anatomy, but the same function
- 9. structures with the same anatomy, but different functions
- 10. the study of different species as embryos to determine common ancestry
- 11. all fossils that have been recorded
Down
- 1. body parts in organisms that no longer serve a purpose, but may have in earlier ancestors of the organisms
- 2. the study of the distribution of species and ecosystems in geographic space and geological time
- 3. a sudden change in the DNA of a organism at birth that results in greater genetic variation in a population
- 4. a change in a population's gene pool due to a random event-resulting in lower genetic variety
- 8. the idea that all life descends from a common ancestor