Across
- 1. 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
- 7. a major ecological community type such as tropical rainforest, grassland, or desert
- 9. the study of the nervous system of living things
Down
- 1. a medicine used to save lives because it destroys harmful bacteria
- 2. the study of living things
- 3. the zone of plant Earth where there is life
- 5. how two different living organisms live together and depend on each other
- 8. a piece of writing about a person’s life written by someone else