Across
- 5. the loss of a species
- 6. formation of a new species
- 7. a visual representation of evolutionary relationships
- 8. change in a population over time
Down
- 1. traits that allow organisms to survive
- 2. any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences
- 3. the ability for an organism to survive and reproduce
- 4. similarity of the structure, physiology, or development of different species of organisms based upon their descent from a common evolutionary ancestor
- 6. organisms with the best traits do this AND reproduce