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His biological works like The Generation of Animals,raised questions about heredity, reproduction and devolopement.
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The first vision aid was invented (inventor unknown) called a reading stone. It was a glass sphere that magnified when laid on top of reading materials.
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Salvino D'Armate is credited with inventing the first wearable eye glasses.
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The art of grinding lenses is developed in Italy and spectacles are made to improve eyesight.
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Placed two lens in a tube.
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Robert hooke saw "cells" in a slice of cork
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Published results in "Microgaphia". Also a description of cork.
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did an experiment to determine if rotting meat turned into flies. He found that meat can't turn into flies. Only flies could make more flies.This was an important experiment because it helped to disprove the theory of spontaneous generation.
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He was first to describe cells and bacteria, seen through his very small microscopes with, for his time, extremely good lenses.
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which leads to microscopy becoming more and more popular among scientists. An important discovery is that lenses combining two types of glass could reduce the chromatic effect, with its disturbing halos resulting from differences in refraction of light.
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He explained that soup that had been exposed to the air contained many micro organisms. He claimed that there was a "life force" present in the molecules of all inorganic matter, including air and the oxygen in it, that could cause spontaneous generation to occur.
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tried variations on John Needham’s soup experiments. He determined that soup in a sealed container was sterile and that micro organisms that caused the soup to spoil had entered from the air not spontaneous generation
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by showing that several weak lenses used together at certain distances gave good magnification without blurring the image.
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first to recognize the importance in the cell's nucleus. He stated that the different parts of plants are composed of cells. He was also the co-founder of the cell-division theory.
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He discovered its jelly like substance.he also saw that the cytoplasm of an animal cell is completely different and that it serves a different purpose. He also discovered that new plant cells come from the nucleus of older cells.
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Theodor Schwann and Matthias Jakob Schleiden created what is called the cell theory. The cell theory states that all living things are made up of one or more cells
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Rudolf Virchow showed in experiments that bone cells could develop from cartilage cells. He also made microscopic observations of dividing cells from multi-celluar organisms. He concluded that cells divide to produce more cells.
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Louis Pasteur performed a series of experiments leading to the findings of the cures for diseases such as puerperal fever, rabies and anthrax. Invented pasteurization (sterilization by heat). He created the theory.
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correlating resolution to the wavelength of light. Abbes formula make calculations of maximum resolution in microscopes possible.
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Able to study objects below the wavelength of light.
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allows the study of colorless and transparent biological materials.
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The ability to use electrons in microscopy greatly improves the resolution and greatly expands the borders of exploration.
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gives three-dimensional images of objects down to the atomic level.
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the cell theory states 1. All organisms are composed of one or more cells. 2. The cell is the smallest functional unit of life. 3. All cells are produced from other cell