| A | B |
|---|
| Archaebacteria | Kingdom of prokaryotes more like eukaryotic cells than eubacteria; includes methanogens halophiles and thermophiles" |
| bacterial conjugation | Transfer of plasmid DNA from one prokaryotic cell to another |
| bacteriophage | Category of viruses that infect bacterial cells. |
| binary fission | Asexual reproductive mode the body of protozoans and some other animals divides in two parts" |
| cyst | Of many microorganisms - a resting stage with thick outer layers that typically forms under adverse conditions |
| disease | Outcome of infection when defenses aren't mobilized fast enough and a pathogen's activities interfere with normal body functions |
| endospore | Resting structure formed by some bacteria; encloses a duplicate of the bacterial chromosome and a portion of cytoplasm |
| Eubacteria | Kingdom of all prokaryotic cells except archaebacteria |
| extreme halophile | Archaebacterium of unusually saline habitats |
| extreme thermophile | Archaebacterium of very hot aquatic habitats |
| infection | Invasion and multiplication of a pathogen in a host. Disease follows if defenses are not mobilized fast enough |
| lysis | Gross damage to a plasma membrane and/or cell wall that lets the cytoplasm leak out; causes cell death |
| methanogen | Anaerobic archaebacterium that produces methane gas as by-product. |
| microorganism | Organism that can only be seen with aid of microscope |
| Pathogen | Any bacteria that can cause a disease |
| prokaryotic fission | Cell division mechanism by which a bacterial cell reproduces |
| viroid | Infectious particle of short |
| virus | A noncellular infectious agent made of DNA or RNA |
| virulent | A disease causing virus that undergoes the lytic cycle |
| temperate | a virus that undergoes the lysogenic cycle and does not immediately cause of disease |
