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