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The Cell System
| Organism a living thing | Cell the basic unit of structure and function in living things |
| Unicellular made of a single cell | multicellular consisting of many cells |
| stimulus any change or signal in the environment that can make an organism react in some way | response an action or change i behavior that occurs as a result of a stimulus |
| spontaneous generation the mistaken idea that living things arise from nonliving sources | homeostasis the condition in witch an organisms internal environment is kept stable in spite of changes in the external environment |
| characteristics a feature that helps to identify something | microscope an instrument that makes small objects look larger |
| cell theory a widely accepted explanation of the relationship between cells and living things | distinguish to manage to recognize something you can barely see. to point out a difference |
| growth size or stage of development | hand lens a magnifying glass designed to be held in the hand |
| magnification to increase the apparent size of an object | reproduce to reproduce its kind as in a organism bear offspring |
| energy the ability to do work or cause change | waste anything left over or not of use |