Across
- 4. man who invented the "survival of the fittest"
- 8. two species evolving to have similarities
- 9. change in a population over time
- 10. a random change in dna that could be advantageous or harmful
Down
- 1. the number of organisms in an environment
- 2. the process of nature removing organisms not fit to their environment
- 3. where an animal or plant lives
- 5. changing to fit your environment
- 6. two species co-existing
- 7. two species evolving separately from a common ancestor