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Spontaneous GenerationThe theory of spontaneous generation is that living organisms may be produced fom nonliving matter.
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first microscopeJansen invented the first microscope.
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theory plants grew by eating soilis best known for a single expiriment stating that the weight a plant gains during growth is due to the absorption to an equal amount of soil.
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cells discovered in slice of corkWhen Hooke viewed a thin cutting of cork he discovered empty spaces contained by walls, and called them cells.
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bacteria describedAnton Van Leeuwenhoek was the first to see and describe bacteria.
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cell nucleus in the cell of an orchidBrown descibed the cell nucleus in cells of the orchid.
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plants_cell theorySchlieden investigated plants microscopically and conceived that plants were made up of cells.
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plant and animal cellsCells form by free-cell fromation similar to the formation of crystals (spontaneous generation).
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cell theoryIn 1839, he extended Schleiden's cell theory to animals, stating that all living things are composed of cells.
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sperm cells and egg cells are found to also be cellsAlbrecht von Roelliker realized that sperm cells and egg cells are also cells.
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expands thought that cells develop from existing cells1858 Rudolf Virchow expounds his famous conclusion: that is cells develop only from existing cells.
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theory bacteria comes from the environmentPasteur then formed experiments to find where these bacteria came from, and was able to prove that they were introduced from the environment.