| A | B |
|---|
| decomposer | breaks down complex material into simple nutrients |
| saprobe | lives on dead organisms |
| cocci | round bacteria |
| bacilli | rod-shaped bacteria |
| spirila | spiral shaped bacteria |
| DNA | nucleic acids that program cell activities |
| cytoplasm | liquid in a cell |
| nucleus | part of a cell where the DNA is |
| host | organism that is infected with a parasite |
| flagella | whip-like projections that move single-celled organisms around |
| vaccine | a weakened from of a disease used to protect against getting the disease |
| epidemic | when many people in an area are infected with the same disease |
| pandemic | when many people in many countries have the same disease |
