| A | B |
|---|
| Unicellular Organisms | Bacteria, amoeba, certain algau; made up of only a single cell |
| Multicellular Organisms | Many-celled |
| Tissue | A group of cells that have the same basic structure and function |
| Organ | A structure composed of many different tissues that work together |
| System | A group of organs working together |
| Organism | Multicellular organisms are composed of this group of organ systems working together |
| Cytoplasm | Living cells contain this substance |
| Metabolism | The sum of all chemical changes in cells |
| Eukaryotes | Cells that posses a membrane-bound organelle |
| Prokaryotes | Opposite of eukaryotes |
| Ribosomes | Proteins are made from these amino acids at organelles |
| Endoplasmic reticulum | In eukaryotic cells; other ribosomes are attached to the membranes of these |
| Golgi bodies | Saclike structures, close to the ER |
| Mitochondria | The powerhouses of cells; found in all eukaryotic cells |
| Nucleus | The control area of eukaryotic cells |
| Chromatin | Dnse mass of material which is composed of individual chromosomes |
| Nucleoli | One or more prominent bodies visible in the nuclei, made of chromosome parts |
| Chloroplasts | Most common pigment-containing plastids |
| Lysosomes | Vesicles formed from the Golgi bodies |
| Vacuoles | Fluid-filled, membrane-bound structures that store cell produced substances |
