| A | B | 
|---|
| cytoplasm | jelly-like substance inside a cell | 
| Hooke | discovered cells while looking a tree bark | 
| cytoskeleton | provides a cell with shape, support, and strength. | 
| endoplasmic reticulum | assembles molecules | 
| ribosomes | where proteins are made | 
| golgi | packages the molecules made in the ER | 
| vesicle | transports the substances in a cell | 
| lysosome | digests old organelles | 
| mitochondria | where energy is made | 
| nucleus | controls the cell's activities | 
| eukaryote | a cell with a nucleus and membrane-bound organelles | 
| prokaryote | a cell without a nucleus and membrane-bound organelles | 
| organelle | a small structure within a cell that has a specialized function | 
| diaphragm | adjusts the amount of light on a microscope | 
| nosepiece | this is where the objectives on a microscope are located | 
| coarse adjustment | moves the stage up and down | 
| stage clips | holds a microscope slide in place | 
| scanning objective | the objective used to locate a specimen on a microscope slide | 
| Leeuwenhoek | invented a simple light microscope in the 1600s | 
| cell membrane | surrounds the cell; allows some materials to exit or enter the cell. |