Across
- 2. living and nonliving organisms living in the same area
- 5. beneficial adaptations being passed on to offspring
- 6. differences in traits
- 9. preserved remains or traces of ancient organisms
Down
- 1. the ability of an organism to survive and reproduce
- 3. a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding
- 4. the complete disappearance of a species from Earth
- 7. a trait or behavior that helps and organism reproduce
- 8. change in the characteristics of species over several generations through the process of natural selection.