| A | B |
| atom | smallest part of an element |
| cell | the basic unit of life: the basic unit of structure and function for all living organisms |
| cell membrane | organelle that regulates the exchange of material into and out of the cell |
| cell wall | organelle found only in plants, fungi, and bacteria that provides structure and support |
| centriole | organelle that helps in cell division |
| chloroplast | an organelle found in plant cells that transforms sunlight into chemical energy |
| chromosome | organelle that contains genetic material |
| cilia | organelle that is used in locomotion (short, hairlike structures) |
| cytoplasm | organelle that fills a cell's internal volume |
| cytoskeleton | organelle that provides shape and support |
| DNA | contains the genetic information for living things |
| endoplasmic reticulum | organelle responsible for transportation |
| eukaryote | organism that has a nucleus and organelles |
| flagellum | organelle that is used in locomotion (long, whip-like structure) |
| Golgi apparatus | organelle that packages and sorts |
| homeostatsis | the process of maintaining a constant internal environment |
| lysosome | organelle that contains digestive enzymes (breaks down) |
| metabolism | the chemical processes that occur within a living thing in order to maintain life |
| mitochondrion | organelle involved in energy transformation |
| molecule | smallest part of a compound; union of two or more atoms |
| nucleolus | organelle that makes ribosomes |
| nucleus | organelle that contains genetic material |
| organ | group of tissues that work together to perform a similar function |
| organelle | a subunit within a cell that has a specialized function |
| organism | an individual living thing |
| organ system | group of organs working together to perform a similar function |
| prokaryote | organism that does NOT have a nucleus or organelles |
| ribosome | organelle that makes proteins |
| stimulus | a signal in the environment that causes a reaction by a living thing |
| tissue | group of similar cells performing a job or function |
| vacuole | organelle involved in storage |