Across
- 1. a piece of writing written by a person about his or her own life
- 3. the study of the nervous system of living things and how it helps the living things learn and react
- 4. the study of living things
- 6. a tablet of substances that are thought to promote a healthy life
- 9. quality or state of being full of life; state of being full of energy
- 10. a diet thought to help people live longer because it focuses on natural foods
- 12. the removal of living tissue from the body for diagnostic examination
- 13. to bring back to life again
- 15. a person who lives through a difficult event or experience
- 17. surgery on living animals; medical research that involves cutting into animals to study organs, parts, or diseases
- 19. the ability to continue living
- 20. how two different living organisms live together and depend on each other
Down
- 2. a person who studies living things
- 5. full of life; fun; lively; animated
- 7. (adj) necessary or essential to life
- 8. a medicine used to save lives because it destroys harmful bacteria and cures infections
- 11. to bring something back after it declined in condition or popularity; to breathe new life into something
- 14. the zone of planet Earth where there is life (between the deep crust and the lower atmosphere)
- 16. a piece of writing about a person's life written by someone else
- 18. "as big as life"; brightly colored; daring