Across
- 4. necessary to life
- 8. pill that promotes a healthy life
- 9. book was written by a person about his/ her life
- 10. removal of living tissue for testing
- 11. a person who lives through a difficult event
- 13. book was written about a person by someone else
- 16. brightly colored
- 17. the study of living things
- 18. medicine that destroys harmful bacteria
- 19. how two different organisms live together and depend on each other
Down
- 1. diet diet thought to help people live longer
- 2. zone of Earth where there is life
- 3. to bring back to life again
- 5. the study of the nervous system and how it helps the living things learn and react
- 6. state of being full of life; full of energy
- 7. surgery on living animals
- 11. the ability to continue living
- 12. full of life; fun; lively
- 14. to breathe new life into something after it declined
- 15. person who studies living things