| A | B |
| antibiotic | a medicine that destroys bacteria |
| autobiography | writing about your own life |
| biography | writing about somebody else's life |
| biologist | a person who studies living things |
| biology | the study of living things |
| biopsy | removing living tissue from the body to study |
| biosphere | the zone of Earth with life |
| macrobiotic diet | a diet focused on natural foods |
| neurobiology | study of the nervous system of living things |
| symbiosis | how two organisms live together |