| A | B |
| pathogens | organisms that produce disease |
| endospores | thick-walled structures around bacteria |
| cocci | sphere-shaped bacteria |
| flagella | whiplike tails that move bacteria |
| bacteria | one-celled organisms without membrane-bound organelles |
| fission | bacterial method of reproduction |
| antibiotic | produced by one organism, but inhibits or kills other organisms |
| toxins | poisons produced by pathogens |
| spirilla | spiral-shaped bacteria |
| bacilli | rod-shaped bacteria |
| saprophyte | am organism that uses dead material as a food and energy source |
| aerobic | an organism that uses oxygen for respiration |
| anaerobe | an organism that can live without oxygen |
| bioremediation | process that uses bacteria to break down wastes and pollutants |
| vaccine | solutions made from dead viruses that is used to prevent viral diseases |
| archaebacteria | bacteria that live under extreme conditions |