| A | B |
| bacteria | living |
| virus | non-living |
| autotroph | makes it's own food |
| heterotroph | feeds off of others |
| viruses are like | parasites |
| active virus | once inside, takes over the genetic material |
| hidden virus | once inside, it becomes part of the cell's genetic material |
| bacteria are | prokaryotes |
| bacteria | no nuclei |
| ribosomes | chemical factories where proteins are produced |
| flagellum | whiplike structure that helps a cell move |
| asexual reproduction | one parent |
| sexual reproduction | two parents |
| endospore | small resting cell |
| decomposers | organisms that break down large chemicals in dead organisms into small chemicals |
| binary fission | one cell divides into two cells |
| conjugation | one bacterium transfers some of its genetic material into another |
| antibiotic | chemical that can kill bacteria without harming a person's cells |
| vaccine | substance that stimulates the body to produce chemicals that destroy viruses or bacteria |
| infectious diseases | illnesses that pass from one organism to another |