| A | B |
|---|
| antibiotic | substance that kills harmful bacteria |
| bacilli | rod-shaped bacteria |
| bacteria | single-celled organism in the Kingdom Monera |
| binary fission | form of asexual reproduction in which one cell divides into two identical cells |
| blue-green bacteria | bacteria that makes it food by photosynthesis |
| capsid | coat of protein covering a virus |
| chlorophyll | green pigment that is used for photosynthesis |
| cocci | spherical or egg-shaped bacterium |
| decomposers | organisms that feed on dead organisms |
| nitrogen fixation | process by which nitrogen gas in the atmosphere is converted to a more useful form of nitrogen (ammonia) |
| phytoshynthesis | process by which light energy is used to make food |
| prion | an agent of infection that are smaller than a virus and are made up of very small pieces of protein |
| rickettsia | a group of bacteria that are hosted by ticks and lice |
| spirilla | spiral-shaped bacteria |
| spirochetes | corkscrew-shaped spirilla bacteria |
| viral replication | process by which viruses reproduce other viruses |
| viroid | an agent of infection that are smaller than a virus and are made up of very short pieces of nucleic acid without a capsid |
| virus | piece of nucleic acid covered with an outer coat of protein |
