biology

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Across
  1. 5. maintaining a constant internal environment
  2. 7. involves two parents
  3. 10. releasing chemical energy
  4. 12. the breakdown of food
  5. 15. the taking in of food
  6. 16. how an organism take material from the environment
  7. 17. increase size of an organism
  8. 18. the study of life
Down
  1. 1. they help maintain homeostasis
  2. 2. chemical substances in food
  3. 3. invovles all the chemical reactions
  4. 4. involves one parent
  5. 6. materials enter and leave cells or get moved around
  6. 8. removal of an organisms metabolic wastes
  7. 9. producing new offspring
  8. 11. help getting rid of undigested food from the body
  9. 13. combining simple substances
  10. 14. something capable of living on its own