10.1-10.2

2. Organs that are similar in different organism and are thought to show evolutionary relationships.
6. The theory that suggests that the currently observable processes that occurred at the same rate in the past as they do in the present.
8. The process by which some phenotypes within a species become more common than others because of variations that lead to increased survival rates.
10. An ancestral organism whose offspring diverged into two or more species.
11. A structure that seems to have no function in an organism and is thought to be left over from the evolutionary process.

1. The idea that organisms can slowly change over time into other kinds of organisms.
3. anatomy The study of similarities and differences in the anatomy of different species.
4. The human practice of breeding organisms that have desirable traits and variations.
5. The preserved remains or trace of an organism that lived in the past.
7. Darwin’s idea that all organisms come from common ancestors and change a little with each generation.
9. A heritable trait that improves the reproductive success of an organism.