| A | B |
|---|
| prokaryote | an organism that consists of a single cell that does not have a nucleus |
| binary fission | a form of asexual reproduction in single-celled organisms by which one cell divides into two cells of the same size |
| endospore | a thick-walled protective spore that forms inside a bacterial cell and resists harsh conditions |
| virus | a microscopic particle that gets inside a cell and often destroys the cell |
| host | an organism from which a parasite takes food or shelter |
| bioremediation | the biological treatment of hazardous waste by living organisms |
| antibiotic | medicine used to kill bacteria and other microorganisms |
| pathogenic bacteria | bacteria that cause disease |
