| A | B |
|---|
| cell | smallest unit that can perform all life processes. |
| stimulus | A change in an organism's surroundings that causes an organism to react. They include changes in temeperature, light, sound, and other factors. |
| sexual reproduction | reproduction needing two parents. |
| 4 basic needs of living things | water, food, space, and stable internal conditions |
| homeostasis | the maintenance of a constant internal state in a changing environment. |
| asexual reproduction | reproduction needing only one parent. |
| organism | any living thing |
| response | an action or change in behavior. |
| autotroph | organism that can make its own food. |
| heterotroph | organism that cannot make its own food. |
| reproduction | process by which living things produce new organisms like themselves. |
| unicellular | organism composed of only one cell. |
| multicellular | organisms composed of many cells that are specialized to perform certain tasks. |
| development | the process of change that occurs during an organism's life to produce a more complex organism. |
| 6 characteristics living things share | made of cells, made up of the chemicals of life, use energy, grow and develop, respond to surroundings, reproduce |
| carbohydrate | chemical of life that provides energy. |
| proteins and lipids | chemicals of life that are the building materials for cells. |
| nucleic acids | chemiclas of life that provide instructions to the cell. |
| water | most abundant chemical of life. |
| spontaneous generation | incorrect idea that living things can come from nonliving sources. |
