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Period: 300 to
cell theory
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330
Aristotle
He dissected animals and studied the ways that they reproduce. -
First Microscope
Zacharias Jansen and his father, Hans invented and built the first microscope. -
Spontanious Generation
Jan Baptist van Helmont described the idea that living things come from nonliveing things, :Ex: The recipie for mice, pieces of cheese and bread wrapped in rags and left in a dark corner -
Discovey of first cell
Robert Hooke looked at thin slices of cork through a microscope and saw little boxes he called cells. -
First living cell seen
Anton van Leeuwenhoek saw the first living cels through a microscope. -
All organic thing come from cells
Lorenz Oken proposes that “all organic beings originate from and consist of vesicles or cells -
Nucleus discovered
In 1831 a scientist named Robert Brown discovered the cell nucleus. -
Cell theory used on plants
1838 Matthias Schleidens methods had led him to propose the cell theory for plants -
Cell theory used on animals
Theodor Schwann saw the implications of Schleidens work and applied it to animals -
Sperm and egg are cells
Albrecht von Roeliker discovered that sperm and eggs are also cells. -
Cells come from other cells
Rudolph Virchow discovered living cells must come from from preexisting cells -
Spontaneous Generation Disproved
Louis Pasteur used a flask experiment to disprove Spontaneous Generation. the theory that living thing come from nonliving things.
