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 own life, bio (root) - life, biography - a piece of writing about a person's life written by someone else, 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 (between the deep crust and the lower atmosphere), biologist - a person who studies living things, microbiology - the study of very small life forms, symbiosis - two life forms living together, biodegradable - something that was alive and is capable of being decomposed, biodiversity - the diversity of plant and animal life in a particular habitat,

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