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Chapter 5
Viruses and Bacteria
| Term | Definition |
|---|---|
| Ribosome | A tiny structure located in the cytoplasm of a cell where proteins are produced. |
| Conjugation | The process in which a unicellular organism transfers some of its genetic material to another unicellular organism. |
| Endospore | A small, rounded, thick-walled, resting cell that forms inside a bacterial cell. |
| Antibiotic | A chemical that can kill bacteria without harming a person's cells. |
| Infectious Disease | An illness that can pass from one organism to another. |
| Toxin | A poison that can harm an organism. |
| Cytoplasm | The region of a cell located inside the cell membrane (in prokaryotes) or between the cell membrane and nucleus (in eukaryotes); contains a gel-like material and cell structures. |
| Bacteria | Single-celled organisms that lack a nucleus; prokaryotes. |
| Flagellum | A long, whip-like structure that helps a cell to move. |
| Respiration | The process of breaking down food to release its energy. |
| Virus | A tiny, nonliving particle that invades and then reproduces inside a living cell. |
| Antibiotic resistance | The ability of bacteria to withstand the effects of an antibiotic. |
| Host | An organism that provides a source of energy or a suitable environment for a virus or other organism to live. |
| Sexual reproduction | A reproductive process that involves two parents that combine their genetic material to produce a new organism, which differs from both parents. |
| Decomposer | An organism that breaks down chemicals from dead organisms and returns important materials to the soil and water. |
| Binary Fission | A form of asexual reproduction in which one cell divides to form two identical cells. |
| Parasite | An organism that lives on or in a host and causes harm to the host. |
| Bacteriophage | A virus that infects bacteria. |
| Vaccine | A substance introduced into the body to stimulate the production of chemicals that destroy specific disease-causing viruses and organisms. |
| Asexual reproduction | A reproductive process that involves only one parent and produces offspring that are identical to the parent. |
| Pasteurization | A process of heating food to a temperature that is high enough to kill most harmful bacteria without changing the taste of the food. |