| A | B |
|---|
| Robert Hooke | examined thin cork slices with a compound light microscope and saw boxlike structures that he called cells |
| Anton van Leeuwenhoek | first to describe single celled organisms. However, he did not realize that he was seeing single celled organisms |
| Matthias Schleiden | stated all plants are made of cells |
| Theodor Schawann | stated that all animals are made of cells |
| Rudolf Virchow | all cells arise from preexisting cells |
| unicellular organism | single celled organism |
| protoplasm | the jellylike material that fills the cell |
| Prokaryote | cells without a nucleus |
| Eukaryote | cells with a nucleus |
| microscope | instrument that led to the discovery of cells |
| binomial nomenclature | 2 naming system for classification |
| electron microscope | electron beam creates image |
| convex lens (light microscope) | bends light to make object appear larger |
| multicellular | many cells |
| resolution | sharpness-focus |
| homeostasis | stable internal conditions |
| taxonomy | study of how living things are classified |
| scientific name | genus, species |
| water | living things must have |
| animals | multicellular heterotrophs |
| spontaneous generation | mistaken idea that non-living things produce living things |
| autotroph | use sun to make energy |
| heterotroph | get energy from autotrophs or heterotrophs |
| Redi and Pasteur | proved spontaneous generation is wrong |
| stimulus | causes and organism to react |
