Across
- 1. the study of the nervous system of living things and how it helps the living things learn and react
- 5. a medicine used to save lives because it destroys harmful bacteria and cures infection
- 7. a piece of writing about a person's life written by someone else
- 8. how two different living organisms live together and depend
- 9. a diet thought to help people live longer because it focuses on natural foods
Down
- 2. a person who studies living things
- 3. a piece of writing written by a person about his or her own life
- 4. the removal of living tissue from the body for diagnostic examination
- 6. the zone of planet Earth where there is life (between the deep crust and the lower atmosphere)
- 10. each other