| Term | Definition |
| biology | the study of life |
| organism | anything that possesses all the characteristics of life |
| organization | orderly structure of cells in an organism; characteristic of all living things |
| reproduction | production of offspring by an organism; characteristic of all living things |
| species | group of organisms that can interbreed and produce fertile offspring |
| growth | increase in the amount of living material and formation of new structures in an organism; characteristic of all living things |
| development | all the changes that take place during the life of an orgnanism; characteristic of all living things |
| environment | biotic and abiotic factors within an organism's surroundings |
| stimulus | anthing internally or externally that causes the organism to react |
| response | a reaction to a stimulus |
| homeostasis | regulation of an organism's internal environment |
| energy | the ability to cause change - used by organisms to perform biological functions |
| adaptation | evolution of a structure, behavior or internal process that enables an organism to respond to environmental factors and live to produce offspring; characteristic of all living things |
| scientific methods | procedures that scientists use to gather info and answer questions |
| hypothesis | an explanation for a question or problem that can be formally tested |
| experiment | procedure used to test an hypothesis under controlled conditions |
| control | the standard to which results are compared in an experiment |
| independent variable | the condition that is tested in an experiment |
| dependent variable | the condition that results from changes made to the independent variable |