Across
- 5. a stable internal environment
- 7. where genetic code is stored
- 9. when an organism builds up or breaks down materials
- 11. how a species changes over hundreds of years
- 12. basic unit of all forms of life
Down
- 1. the result off two of the same species reproducing
- 2. what the respiratory system controls
- 3. an individual animal, plant, or single-celled life form
- 4. reproduction: where two parents form a new organism
- 6. a signal
- 8. ribonucleic acid
- 10. reproduction: where a single organism produces an identical offspring