Across
- 2. Populations become more and more dissimilar in terms of genetics and structures.
- 5. Using the development of organisms to show evolutionary relationships.
- 6. A trait that evolved in a common ancestor, and is present in all subsequent groups.
- 8. A diagram showing the evolutionary history of a group of organisms.
- 10. The history of life documented in rocks and imprints.
- 11. The formation of a new species through the course of evolutionary events.
Down
- 1. The most recent individual from all the organisms of a group are descended.
- 3. A physical separation of populations-also called allopatric speciation.
- 4. Darwin's explanation of populations changing with their environment.
- 7. The migration of individuals and their alleles between populations.
- 9. A common ancestor plus all its descendants.