Across
- 5. survival of the fittest
- 6. there are no more
- 7. development of new organisms
- 9. a change in a species
- 10. a sudden change in DNA
Down
- 1. a change that helps an organism survive
- 2. a term used to describe the elite in a species
- 3. human choose the characteristics
- 4. a segment of DNA that codes for a trait
- 8. A change in species over time