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Book A- KT- Ch 1&2
Midterm Study Guide
| Term | Definition |
|---|---|
| development | change that produces a more complex organism |
| fossil | a trace o an ancient organism that has been preserved in rock |
| homeostasis | maintenance of stable internal conditions |
| nucleus | dense area in a cell that contains nucleic acids |
| prokaryotes | organism whose cell lacks a nucleus |
| species | group of organisms that can mate and produce offspring that can also mate and reproduce |
| stimulus | change in the surroundings that causes an organism to react |
| taxonomy | scientific study of how living things are classified |
| cell | basic unit of structure and function in an organism |
| flagellum | long whip like structures that help a cell to move |
| bacteriophage | a virus that infects bacteria |
| virus | tiny nonliving particles that invade a cell |
| conjugation | two bacteria exchange genetic material |
| parasite | harmful organisms that lives on or in a host |
| respiration | the process of breaking down food to release energy |
| cytoplasm | region inside the cell membrane |
| endospore | small, rounded, thick walled resting cell |
| host | energy source for a parasite |
| toxin | poison produced by bacteria |
| ribosomes | cell part in which proteins are made |
| vaccine | stimulates the body to produce chemicals that destroy viruses and bacteria |