| A | B |
| host | living things that provide a home and /or food for a parasite |
| parasite | organism tha tsurvives by living on or ina host organism, thus harming it |
| virus | noncellular particles that infect living cells; causes diseases that cannot be cured by medicine |
| streptococcus | disease caused by bacteria; spherical shape |
| immune system | the parts of the body that fight disease; antibodies, white blood cells, etc. |
| antibody | a chemical produced by the body to attack foreign matter such as viruses |
| decomposers | organisms that break down dead organisms into simler substnaces returning minerals to the soil and water |
| symbiosis | relationship in which one organism lives on, near, or even inside another organisms and at least one of the organisms benefits. |
| anitbiotics | medicine that kills bacteria (could be made from bacteria, fungus) ex. is penicillin |
| measles | diseased caused by a virus |
| vaccine | "dead" or weakened viruses injected into the body to stimulate the production of antibodies |
| "anti" | against |
| mutation | random change in the genes |