Across
- 2. - External conditions
- 4. - Happens over time and affects generations
- 6. - How long an organism is expected to live
- 7. - An organism becomes better suited to its environment
- 8. - the disappearance of a species
Down
- 1. - Range of life in a habitat
- 3. - Happens quickly but doesn't last
- 5. - Survive under circumstances