Across
- 4. getting rid of undigested food
- 5. Activities that con troll and coordinate an organism
- 6. maintaining a constant internal environment
- 8. two parents make offspring
- 11. removal of metabolic wastes
- 12. breakdown of food materials into simple forms
- 14. making new offspring
- 15. materials enter an organism and leave or get moved
- 16. Increase in an organism's size
- 17. substances in a food that an organism needs
- 18. study of life
Down
- 1. how an organism takes materials from the environment and uses them
- 2. producing new offspring with only one parent
- 3. combining simple substances to make complex substances
- 7. taking in food
- 9. all the chemical reactions carried on in an organism
- 10. something capable of living on its own
- 13. releasing chemical energy from complex reactions