evoltion vocab

4. a group of similar organisms that can mate with each other and produce fertile offspring
7. the study of body structure of organisms
8. any difference between individuals of the same species
9. a trait that helps an organism survive and reproduce
11. selection: the process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species
12. theory: a well tested concept that explains a wide range of observations
14. tree: a diagram that shows how scientists think different groups of organisms are related

1. the theory that evolution occurs slowly but steadily.
2. structures: anatomical structures that occur in different species and that originated by heredity from a structure in the most recent common ancestor of the species
3. structures: structures that seen to serve no function but resemble structures with functionall roles in related organisms
5. a species that does not have any living members
6. the gradual change in a species over time
10. equilibria: the theory that species evolve during short periods of rapid change
13. structures: anatomical structures that have closely related functions but don't derive from the same ancestral structure