Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
CONTRIBUTIONS TO THE CELL THEORY Timeline of scientists and their discoveries 1) Anton von Leeuwenhoek 1600’s Dutch businessman Invented 1st simple light microscope Anton von Leeuwenhoek (con’t) Observed tiny organisms in pond water Organisms were nicknamed “wee beasties” 2) ROBERT HOOKE 1665 English physicist Observed flowers, insects, and plant tissue ROBERT HOOKE (con’t) Observed thin slices of cork (oak tree) Coined the term “cell” based on the rooms in a monastary 3) ROBERT BROWN 1833 Scottish botanist: scientist who studies plants Observed plant cells under the microscope ROBERT BROWN (con’t) Observed a dark structure inside each cell and coined the term “nucleus” 4) MATTHIAS SCHLEIDEN 1838 German botanist Concluded all plants are made up of cells 5) THEODORE SCHWANN 1839 German biologist Concluded all animals are made of cells 6) RUDOLF VIRCHOW 1855 German Physician Studied cell reproduction Concluded all cells arise from preexisting cells The cell theory 1. All living things are composed of cells 2. Cells are the basic unit of structure and function in living things. 3. All cells arise from preexisting cells.