| A | B |
|---|
| organism | a living thing |
| cell | the basic unit of structure and function in organisms |
| structure | the way an organism is made |
| function | the job an organism performs |
| stimulus | a change in an organism's surroundings that causes an organism to respond |
| external stimulus | a change in an organism's surroundings that causes the organism to react |
| internal stimulus | a change from within an organism, such as hunger and thirst, that causes the organism to respond |
| response | an action or change in behavior that occurs as a result of a stimulus |
| reproduce | the production of offspring that are similar to the parents |
| spontaneous generation | the mistaken idea that living things arise from nonliving sources |
| autotroph | an organism that makes its own food |
| heterotroph | an organism that cannot make its own food |
| homeostasis | the process by which an organism's internal environment is kept stable in spite of changes in its external environmentt |
| microscope | an instrument that makes small objects look larger |
| compound microscope | a light microscope that has more than one lens |
| cell theory | a widely accepted explanation of the relationship between cells and living things |
| magnification | the ability to make things look larger than they are |
| resolution | the ability to clearly distinguish the individual parts of an object |
