Across
- 2. when both species benefit
- 3. when two organisms interact with each other
- 5. when two species evolve together
- 7. when one organism feeds on another
- 8. how well something can survive
- 10. change to an organism's genetic material
- 11. how organisms have changed over time
- 12. struggle among living things
- 13. when only one species benefits
Down
- 1. ability to get the best possible mate
- 4. individuals are more likely to survive
- 6. differences in a species
- 9. an inherited behavior or characteristic