Across
- 5. selection process by which humans modify a species by breeding it for certain traits.
- 7. measure of an organism's ability to survive and produce offspring relative to other members of a population in a given environment
- 8. remnants of organs or structures that functioned in an earlier ancestor and no longer serve a useful function.
- 9. theory that states that natural disasters such as floods and volcanic eruptions have happened often and have shaped Earth's land forms and caused extinction of some species.
- 11. change in a species over time; process of biological change by which descendants come to differ from their ancestors.
- 13. selection mechanism by which individuals that have inherited beneficial adaptations produce more offspring on average than do other individuals.
- 14. all of the individuals of a species that live in the same area.
- 15. traces of organisms that existed in the past.
Down
- 1. group of organisms so closely related that they can mate to reproduce fertile offspring.
- 2. principle that states that the changes in land forms result from slow changes over a long period of time.
- 3. ability of a trait to be passed from one generation to the next.
- 4. structure/body part that is similar in structure on different organisms but performs different functions.
- 6. inherited trait that is selected for over time because it allows an organism to better survive and reproduce in its environment.
- 10. structure that perform a similar function - in the case of flight- but are not similar in origin.
- 12. the differences in the physical traits of an individual from those of other individuals in the group to which it belongs