| A | B |
|---|
| antibiotic | a chemical substance that kills or slows the growth of bacteria |
| asexual reproduction | the reproducing of a living thing from only one parent |
| bacteria | very small, one-celled monerans |
| biotechnology | the use of living things to solve practical problems |
| blue-green bacteria | small, one-celled monerans that contain chlorophyll and can make their own food |
| capsule | a sticky outer layer found on bacteria that keeps the cell from drying out and helps the cell stick to food and other cells |
| colony | a group of similar cells growing next to each other that do not depend on each other |
| communicable disease | a disease that can be passed from one organism to another |
| decomposer | living things that get their food from breaking down dead matter into simpler chemicals |
| endospore | a thick-walled structure that forms inside the cell, enclosing al lthe nuclear material and some cytoplasm |
| fission | the process of one organism dividing into two organisms |
| flagellum | a long, whiplike thread, used by bacteria in order to move |
| host | an organism that lives in or on another living thing and gets food from it |
| interferon | a chemical substance that interferes with the way viruses reproduce |
| Koch's postulates | steps for proving that a disease is caused by a certain microscopic organism |
| parasite | an organism that lives in or on another living thing and gets food from it |
| pasteurization | the process of heating milk to kill harmful bacteria |
| saprophyte | organisms that use dead materials for food |
| vaccine | substances made from weakened or dead viruses |
| virus | made of a chromosome-like part surrounded by a protein coat |
