Across
- 3. allows comparison between extinct and present day organisms
- 7. unit of inheritance (example eye color)
- 8. mechanism of evolution due to a change in environment
- 10. change in populations over time
- 12. traits found in both ancestors and their descendants
- 15. inherited characteristic that enhances fitness of an organism
- 17. strength, able to survive
- 18. was the first to build the theory of natural selection by studying organisms on Galapagos Islands
- 20. structures with same anatomical layout but different functions; support common ancestry
Down
- 1. prevent the attempt or act of mating
- 2. structures that express similar features due to similar environments not common ancestry
- 4. distribution of plants and animals
- 5. traits found in a specific descendant but not its ancestor; specific to that descendant
- 6. able to reproduce
- 9. mechanism of evolution; random changes in genetical material
- 11. version or type of gene (example blue eyes)
- 13. adaptation that allows an organism to blend into its environment
- 14. an adaptation that allows a harmless species to resemble a harmful species
- 16. mechanisms of evolution; changes in allele frequencies due to CHANCE events; impacts smaller populations
- 19. mechanism of evolution; movement of individuals into and/or out of a population; immigration and emigration are examples