click below
click below
Normal Size Small Size show me how
Discovery of cells
| Question | Answer |
|---|---|
| Cell | Basic unit of all organisms; all living things are composed of cells. |
| Compound light microscope | Instrument that uses light and a series of lenses to magnify objects in steps; can magnify an object up to 1500 times its size. |
| Cell theory | 1.All organisms have one or more cells. 2.The cell is the basic unit of structure. 3.All cells come from preexisting cells. |
| Electron microscope | Instrument that uses a beam of electrons instead of light to magnify structures up to 500,000 times its actual size. Allows scientists to view structures within a cell. |
| Organelle | Membrane-bound structures with particular functions within eukaryotic cells. |
| Prokaryote | Unicellular organisms, such as bacteria,each of which is composed of a prokaryotic cell. Lack membrane bound structures. |
| Eukaryote | Unicellular or multicellular organisms such as yeast, plants and animals, composed of eukaryotic cells, which contain a true nucleus and membrane bound organelles. |
| Nucleus | Positively charged center of a atom composed of neutrons and positively charged protons, and surrounded by negatively charged electrons |