Across
- 2. all of the changes over time
- 4. generation to generation change in the frequency of alleles
- 9. similar structures among related species
- 10. drugs that kill or slow the growth of bacteria
- 12. generations maintain frequencies of alleles over generations
- 14. Darwin's name for the fact that species on earth today are related to historical called 'descent with __'
- 15. an organism engineered in a lab
Down
- 1. famous ship of Darwin
- 3. the movement of genes into or out of a population
- 5. famous for his work in evolution
- 6. have a major function for one species but not related species
- 7. differences among members of the same species
- 8. collected in rock layers over time
- 11. all the alleles that make a population
- 13. small, circular DNA molecules