Across
- 3. man who came up with the idea of natural selection
- 6. remains of organisms that once lived
- 8. how fossils are organized according to time
- 9. change in DNA
- 10. how well an organism can survive
Down
- 1. choosing a mate based on higher fitness
- 2. new alleles that enter the population
- 4. bones that are the same shape/place in different species
- 5. organisms that are best suited for their environment
- 7. random chance that alleles are lost to a population