| A | B |
|---|
| bacteria | single celled organism-prokaryote |
| flagellum | long whip-like structure-helps unicellular organisms move |
| binary fission | form of asexual reproduction-one cell divides making two identical cells |
| asexual reproduction | reproduction by one parent-offspring is identical to parent |
| sexual reproduction | two parents combine genetic material-offspring differnt from both parents |
| conjugation | when a unicellular organism transfers some genetic material to another unicellular organism |
| decomposers | organism that breaks down dead organisms returning important materials to soil and water |
| infectious diseases | disease that can pass from one organism to another |
| antibiotic | chemical that kills bacteria without harming humans |
| virus | small nonliving particle that invades and reproduces inside a living cell |
| host | organism that provides a source of energy or home for another organism |
| parasites | organism that lives on or in a host-can be harmful |
| bacteriophage | virus that infects a bacteria |
| vaccine | pathogens that have been weakened or killed that boost the immune system |
| endospore | thick walled resting cell that forms inside a bacterial cell |
