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