| Term | Definition |
|---|
| science | organized way of using evidence to learn about the natural world |
| observation | use of one or more of the senses to gather information |
| data | evidence, information gathered from observation |
| inference | logical interpretation based on prior knowledge |
| hypothesis | possible explanation for a set of observations or possible answer to a specific question |
| biology | science that seeks to understand the living world |
| cell | collection of living matter enclosed by a barrier that separates the cell from its surroundings, basic unit of life |
| sexual reproduction | process by which cells from two different parents unite to produce the first cell of a new organism |
| asexual reproduction | process by which a single parent reproduces by itself |
| metabolism | set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes |
| stimulus | signal to which an organism responds |
| homeostasis | process by which organisms maintain a relatively stable internal environment |
| evolution | change in a kind of organism over time |
| metric system | decimal system of measurement based on certain physical standards and scaled on mutiples of ten |
| microscope | device that produces magnified images of structures too small to see with the unaided eye |
| compound light microscope | microscope that allows light to pass thru a specimen and uses two lenses to form an image |
| electron microscope | microscope that forms an image by focusing beams of electrons onto a speciman |
| cell culture | group of cells grown in a nutrient solution from a single original cell |
| cell fractionation | technique in which cells are broken into pieces and the different cell parts are separated |
| spontaneous generation | hypothesis (disproved) that life could arise from non-living matter |
| controlled experiment | test of effect of single variable, changing it while keeping all others the same |
| manipulated variable | factor in an experiment purposely changed; independent variable |
| responding variable | factor which may change in response to manipulated variable; dependent variable |
| theory | well-tested explanation; unifies a broad range of observations |
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