Across
- 4. A type of history that sequence of heritable changes that occurred among species since the origin of life on Earth.
- 6. To change the frequencies of alleles in a population over time.
- 7. When evolutionary change does occur, it happens quickly in bursts.
Down
- 1. When organisms are descended from a single ancestor.
- 2. Changes occur gradually and sequentially.
- 3. A type of structure meaning similar.
- 5. The study of the structures of organisms and their parts.