Across
- 3. A characteristic that helps an organism survive and reproduce.
- 5. The scientist who developed the theory of natural selection.
- 6. The ability of an organism to survive and reproduce in its environment.
- 7. The passing of traits from parents to offspring.
- 8. A change in the genetic makeup of a population over time.
Down
- 1. The struggle between organisms to survive as they attempt to use the same resources.
- 2. The process where organisms best suited to their environment survive and reproduce.
- 4. Differences in traits among individuals of a species.