Across
- 3. collection of alleles found in all of the individuals of a population
- 4. study of fossils or extinct organisms
- 8. proportion of one allele, compared with all the alleles for that trait, in the gene pool
- 12. principle that states that the changes in the landforms result from slow changes over time
- 13. theory that states that the geological processes that shape earth are uniform through time
- 14. body part that has the same function but has a different structure
- 16. process by which humans modify a species by breeding it for certain traits
- 17. remnants of an organ or structure that functioned in an earlier ancestor
- 19. measure of an organism's ability to survive and produce offspring relative to other members of a population
- 20. a change in species over time
Down
- 1. all the individuals of a species that live in the same area
- 2. study of the distribution of organisms around the world
- 5. body part that is similar in structure but has different structures
- 6. ability o0f a trait to be passed from one generation to the next
- 7. differences in physical traits of an individual from the group to which it belongs
- 9. trace of an organism from the past
- 10. mechanism by which individuals that inherited beneficial adaptions produce more offspring on average than do other individuals
- 11. inherited traits that is selected for over time because it allows the organisms to better survive in the environment
- 15. theory that states that natural disasters shaped earth's landform and caused extinction of some species
- 18. group of organisms so similar to one another that they can breed and produce fertile off spring