Across
- 4. Group of living organisms similar to one another
- 8. When an organism changes, becoming better suited to its environment
Down
- 1. Preserved remains of a prehistoric organism
- 2. Specific area where an organism inhabits
- 3. Relating to time
- 5. A community of organisms
- 6. The process of a species to have no more living members
- 7. Being physically fit and healthy