Across
- 8. One-celled
- 9. Artificial choice of life or death in the animal world.
- 11. The end to an entire species.
- 12. Steady decline of intelligence in a species
Down
- 1. Also known as evolution based on envirnment
- 2. To destroy life
- 3. Containing more than one cell
- 4. Ability to process and use energy.
- 5. A single-celled organism with no nucleus.
- 6. Similarly used as sticking to an object.
- 7. To form as one unit
- 10. Organism with a clear nucleus.