Across
- 1. types of birds Darwin found on the Galapagos Islands
- 6. Charles Darwin's Book on _____
- 7. father of Evolution
- 8. remnants of organs that had a function in an early ancestor
- 9. states natural disasters like floods and earthquakes force species to go extinct/evolve
- 10. geological processes that shape the earth are uniform through time and can bee seen by look at rock strata like an ancient "yearbook"
- 11. chain of islands that were important to evolution
- 12. Any inherited characteristic that increases an organism's chance of survival
- 13. how often that gene occurs in the gene pool
- 16. all of the genes that an organism possesses worldwide
- 18. Survival of the fittest
- 20. all of the genes in a population including all of the 'possible' alleles
Down
- 2. differences among individuals of the same species
- 3. ship Darwin sailed on
- 4. group of interbreeding individuals
- 5. split up by geographical location
- 14. traces of organisms that lived in the past
- 15. structure that contains features that are similar in structure but appear in different organisms and often have different functions
- 17. gradual changes over time altering the landscape
- 19. structures that perform a similar function but are not similar in origin