| A | B |
|---|
| virus | a chromosome like part surrounded by a protein coat |
| host | an organism that provides food for a parasite |
| parasite | an organism that feeds off living things |
| interferon | a chemical substance that interferes with the way viruses reproduce |
| vaccine | a substance made from weakened or dead viruses to protect against certain diseases |
| bacteria | very small, one celled monerans |
| colony | a group of similar cells growing next to each other that do not depend on each other |
| capsule | a sticky outer layer produced by bacteria |
| flagellum | a whip-like thread used for movement by bacteria |
| fission | the process of one organism dividing into two organisms |
| asexual reproduction | the reproducing of a living thing from only one parent |
| endospore | a thick-walled structure that forms inside a bacterial cell |
| saprophyte | an organism that uses dead materials for food |
| decomposer | living things that get their food from breaking down dead matter into simpler chemicals |
| Koch's postulates | steps for proving that a disease is caused byb a certain microscopic organism |
| communicable disease | a disease that can be passed from one organism to another |
| antibiotic | a chemical substance that kills or slows the growth of bacteria |
| biotechnology | the use of living things to solve practical problems |
| pasteurization | the process of heating milk to kill harmful bacteria |
| blue-green algae | small one-celled monerans that contain chlorophyll and can make their own food |
