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A great mind, Aristotle created easy methods of logic, theorizing, and truth seeking that many people would use, he also theorized that an organism develops from an undifferentiated matterial.
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Invented the Microscope.
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He discovered that cells can reproduce, this was found by watering a tree for 5 years. Although he believed this was do to spontaneous generation, he also created formulas for living creatures.
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Discovered "cells" when looking at a cork through a telescope, named them cells after realizing they were like rooms of building.
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Discovered the existence of single celled organism, he did this by examining some lake water.
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Believed that all living things were made of something invisible to out eyes, he stated that we were made of tiny "cells".
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Discovered the nucleus of a cell. Believed in cell theory and worked to further it.
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Declared the basic building block of life to be the cell, discovered that all beings begin as one cell.
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Discovered that all living things are made of cells
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Theorized and discovered that tissue was a group of cells. Also theorized that only cell material can make cells.
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He studied and theorized disease at the microscopic level. Discovered cells divide to make more cells.
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Found that microbial growth would only occur in a broth open to the air, this proved that you needed at least one cell to make more, disproving spontaneous generation and creating the process known as pasteurization.