| A | B |
|---|
| cell membrane | A cell structure that controls which substances can enter or leave the cell. |
| cell theory | A widely accepted explanation of the relationship between cells and living things. |
| cell wall | A rigid layer of nonliving material that surrounds the cells of plants and some other organisms. |
| chloroplast | A structure in the cells of plants and some other organisms that captures energy from sunlight and uses it to produce food. |
| cytoplasm | The region between the cell membrane and the nucleus; in organisms without a nucleus, the region located inside the cell membrane. |
| endoplasmic reticulum | A cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another. |
| Golgi body | A structure in a cell that receives proteins and other newly formed materials from the endoplasmic reticulum, packages them, and distributes them to other parts of the cell. |
| microscope | An instrument that makes small objects look larger. |
| nucleus | A cell structure that contains nucleic acids, the chemical instructions that direct all the cell’s activities. |
| organelle | A cell structure that carries out a specific function within the cell. |
| ribosome | A small grain-like structure in the cytoplasm of a cell where proteins are made. |
| vacuole | A sac inside a cell that acts as a storage area. |
| cell | The basic unit of structure and function in living things. |
| lysosome | A small, round cell structure containing chemicals that break down large food particles into smaller ones. |
| mitochondria | Rod-shaped cell structures that convert energy in food molecules to energy the cell can use to carry out its functions. |
| unicellular | Organism composed of a single cell |
| abiotic | Relating to non-living things |
| biotic | Relating to living things |
| multicellular | Organism that is composed of 2 or more cells |
