| A | B |
| antibiotic | a medicine used to save lives because it destroys harmful bacteria and cures infections |
| autobiography | a piece of writing written by a person about his or her on life |
| biography | a piece of writing about a person’s life written by someone else |
| biologist | a person who studies living things |
| biology | the study of living things |
| biopsy | the removal of living tissue from the body for diagnostic examination |
| biosphere | the zone of planet Earth where there is life |
| macrobiotic diet | a diet thought to help people live longer because it focuses on natural foods |
| neurobiology | study of the nervous system of living things and how it helps the living things learn and react |
| symbiosis | how two different living organisms live together and depend on each other |