Across
- 2. a group of organisms that can mate and have offspring
- 7. Drift – random change in gene frequencies
- 8. a change in DNA
- 9. change in living things over time
- 10. preserved remains of ancient organisms
- 11. Selection organisms with helpful traits survive and reproduce more
Down
- 1. differences among individuals in a species
- 3. traits passed from parents to offspring
- 4. when a species dies out
- 5. a trait that helps an organism survive
- 6. how well an organism survives and reproduces
- 7. Pool – all the genes in a population