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100
Aristotle makes ground breaking discoveries in Biology (no exact date given)
-observed how plants and animals reproduced
-observed sperm and egg cells and their imporance in reproduction -
Zacharias Jansen invents the MICROSCOPE
Jansens microscope allows scientist to observe tiny objects -
Jan Baptist van Helmont creates recipes for animals
-believes spontanous generation is real and that there are recipes for living things -
Robert Hooke discovers CELLS
Discovered small boxes in a piece of cork and called them cells as they looked like the cells where monks lived -
Leeuwenhoek observes Bacteria
-observed the nucleuses of red blood cells of salmon
-first to observe protozoa and bacteria
-Had a hobby of grinding lenses to use to study tiny objects -
Lorenz Oken writes "Die Zeugung"
-Sates that "all organic beings originate from and consist of vesicles or cells"
-Basically saying cells come from cells and all living beings are made of cells -
Robert Brown recognized and termed nucleus of a cell
Says these nuclei are essential to life of the cell -
Matthias Schleiden sees importance of cell's nuclei
-Saw importance of nucleas
-Stated parts of plants are composed of cells -
Theodor Schwann develops the cell theory
-shows there is no such thing as spontaneous generation
-cells come from other cells -
Roelliker cays egg and sperm are cells
-stated egg cells and sperm cells are, in fact, cells -
Rudolph Virchow states cells come from cells
-copied Robert Remak in stating cells coem from preexisting cells -
Louis Pastuer forms theory of Biogenisis
-Formed the theory of Biogenisis proving spontaneous generation was wrong
