| A | B |
| Cell | a basic unit of structure and function in all organisms |
| Cell theory | states that all organisms are made up of one or more cells, the cell is the basic unit of life, and all cells come from other cells |
| Eukaryote | an organism whose cells have a distinct membrane-bound nucleus and organelle |
| Multicellular | composed of more than one cell |
| Organelle | structure in the cytoplasm of a eukaryotic cell that can act as a storage site, process energy, move materials, or manufacture substances |
| Prokaryote | a unicellular organism that lacks a true nucleus and membrane organelle |
| Unicellular | composed of only one cell |
| Cell membrane | the semi-permeable membrane that encloses the contents of a cell |
| Cell wall | the rigid, outermost layer of a plant cell |
| Chlorophyll | the green pigment in the leaves and stems of plants that is necessary for the production of plant food by photosynthesis |
| Chloroplast | a small oval green bit of protoplasm that contains chlorophyll and is the location of photosynthesis. |
| Cytoplasm | inherited genetic material in a cell not specified by its own nucleus. |
| Endoplasmic reticulum | organelle in the cytoplasm that moves materials around in a cell and is made up of a complex series of folded membranes; can be rough or smooth |
| Golgi bodies | organelles that package cellular material and transport them within the cell or out of the cell |
| Lysosomes | the organelle that contains enzymes to break down or digest organic compounds and old organelle |
| Mitrochondria | any of the very tiny rod-like or string-like structures that occur in nearly all cells of plants and animals, and that process food for energy |
| Nucleolus | a small spherical body in the nucleus of a cell, consisting of protein and RNA |
| Nucleus | the part of a cell that controls growth and reproduction |
| Ribsome | small structure on which cells make their own proteins |