| A | B |
|---|
| virus | a small, nonliving particle that invades and then reproduces in a living cell |
| host | an organism that provides a suitable environment for a virus or other organism to live |
| parasite | an organism that lives in or on a host and harms it |
| bacteriophage | a bacteria that only affects bacteria |
| flagellum | whiplike structure that helps some bacteria to move |
| binary fission | one cell dived to make two identical cells |
| asexual reproduction | reproduction involving only 1 parent |
| conjugation | bacteria transfering genetic material to form different bacteria |
| sexual reproduction | reproduction involving two parents |
| infectious disease | a disease that can be transmitted to someone else |
| antibiotic | a medication that can kill bacteria without harming human cells |
| vaccine | a substance that puts your body "on alert" for viruses and bacteria |
