Across
- 1. A sequence of DNA that codes for a particular trait
- 4. Changes in DNA
- 7. The process by which traits that improve an organism's chances for survival and reproduction are passed on
- 9. Selection conducted under human direction
- 10. drift Biological evolution that occurs by chance
Down
- 2. The disappearance of a species from Earth
- 3. Describes how reproductively succesful an organism is in its environment
- 5. A heritable trait that increases an individual's fitness
- 6. The process by which new species are generated
- 8. "Change over time."