| A | B |
|---|
| flagella | whiplike tails that help bacteria move |
| Fission | how bacteria usually reproduce |
| Aerobe | an organism that uses oxygen for respiration |
| anaerobe | an organism that is adapted to live without oxygen |
| Cyanobacteria | Blue-green bacteria found in lakes and ponds and produce oxygen as waste |
| Eubacteria | largest kingdom of bacteria |
| Archaebacteria | kingdom of bacteria that are often found in extreme conditions such as hot springs |
| antibiotics | chemicals produced by some bacteria that are used to limit the growth of other bacteria |
| saprophyte | organism that uses dead organisms as a food source and helps recycle nutrients so they are available for use by other organisms |
| Nitrogen-fixing bacteria | bacteria that convert nitrogen in the air into forms that can be used by plants and animals |
| pathogen | disease-producing organism |
| toxins | poisonous substance produced by some pathogens |
| endospores | thick-walled, protective structure produced by some bacteria when conditions are unfavorable for survival |
| pasteurization | process of heating food to a temperature that kills most harmful bacteria but does not change the flavor of the food |
| vaccine | prepared from killed bacteria or damaged particles from bacterial cells walls or viruses that can prevent some bacterial and viral diseases |
