| A | B |
|---|
| biology | science of life that seeks to provide an understanding of the natural world |
| organism | any unicellular or multicellular form exhibiting all the characteristics of life |
| reproduction | production of offspring |
| species | population of interbreeding organisms capable of producing fertile offspring |
| growth | process resulting in structural changes and increased living material in organisms |
| development | rapidly or slowly occurring changes due to growth in an organism |
| environment | external or internal conditions to which an organism must continually adjust |
| stimulus | any adjustment-requiring condition of an organism's environment |
| response | reaction to an internal or external stimulus |
| adaptation | evolution of structure or behavior that help organisms better survive in an environment |
| homeostasis | the balance of nature in ecosystems |
| energy | ability to do work or move things; powers life processes |
| evolution | change in gene pool of a population in response to various stimuli exhibited by species over time |
