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Aristotle established methods for investigation and reasoning and provided a theory on how embryos generate and develop. He originated the theory of epigenesis.
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Zacharias invented the first optical telescope and the first truly compound microscope
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generated the idea of living things could come from non-living things. He did this by preforming an experiment where he noticed maggots only appearing on the meat that was not covered.
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By using the microscope Robert was the first to visualize a microorganism.
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he made an observation of "little animals" through a microscope. Cells were then being discovered through the microscope which led to improvement of lens-grinding techniques.
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he stated that "all living organisms originate from and consist of cells" which may be the first statement of cell theory
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Added to cell theory the concept of the cell as the basic unit of life. He also did much to elucidate the sex cycles of primitive plants.
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Robert would publish his research and give speeches about his theory's and try to get people to understand them. He discovered the nucleus and its role which ended up backing the second half of cell theory up.
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developed the "cell theory" and then published his monograph microscopic researches into accordance in the structure and growth of plants and animals.
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Discovered all plants were made of cells and later that year that animals were as well
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He discovered that sperm and eggs were composed of the exact same cells humans were formed by.
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Rudolf published a statement based on his observations that cells arise from pre-existing cells, he called this omnis cellula e cellula.
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Louis created a breakthrough of pasteurization which prevented diseases passed through dairy products
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He was the first person to conduct a systematic study of chromosomes during division and called this process mitosis
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discovered that all plants were made of cells and later that year discovered all animals were made of cells
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Discovered the double helix, DNA.