| A | B |
|---|
| virus | Tiny particle that contains hereditary material but is not made of cells |
| electron microscope | Tool needed for scientists to study viruses |
| host | Organism on which a parasite lives |
| bacteriophage | Virus that infects bacteria |
| protein | Material that makes up the protective covering of a virus |
| vaccine | Weakened or killed virus that helps the body produce antibodies |
| tail | Virus part used to attach to host |
| cold | Illness caused by a virus |
| monera | Kingdom that includes bacteria |
| cell wall | Outermost boundary of bacterial cells |
| cytoplasm | Location of hereditary material in bacteria |
| flagellum | Whipllike structure used for movement in some bacteria |
| cytoplasm | Jellylike material found in bacteria |
| endospore | Spherical structure that protects bacteria |
| antibiotic | Chemical that destroys disease-causing bacteria |
| parasite | Organism that feeds on living organisms |
| decomposers | Bacteria that feed on dead matter and return nutrients to the soil |
| coccus | Round shaped bacteria |
| toxins | Poisons released by bacteria |
| autotrophs | Organisms that can make their own food |
