| A | B |
| latent virus | becomes part of a cells DNA without destroying it or making new viruses |
| tetnus | causes muscle spasms that make the jaw clench |
| fission | produces two cells with genetic material exactly like the parent's cells |
| antibiotic resistance | bacteria becomes mutated and are not affected by the drug |
| endospores | heat-resisting structures in bacteria |
| tuberculosis | a disease of the lungs |
| saprophyte | organisms that decompose dead organisms |
| nitrogen-fixing bacteria | bacteria in roots that make nitrogen available to organisms |
| interferon | chemical that stops a virus from reproducing in the body |
| antibiotic | injection used to combat infection |
| thermophiles | bacteria that survive in hot areas |
| toxin | harmful chemical produced by some pathogens |
| viruses | microscopic particles that are not alive |
| flagellum | structure by which some organisms move |
| bacteria | cells that contain DNA, ribosomes and cytoplasm |
| pathogen | an organism that causes disease |
| pasteurization | a process of heating food to kill harmful bacteria |
| anaerobe | organism that can survive without oxygen |
| vaccine | substance that can prevent, not cure, a disease |
| parasite | something that does harm to its host |
| penicillin | an antibiotic that prevents bacteria from making cell walls |
| aerobes | organisms that must have oxygen to survive |