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15 Cards in this Set
- Front
- Back
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Anton van Leeuwenhoek
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given credit for developing the first mini microscope, looked at pond water and made detailed drawings
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Robert Hooke
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coined the term 'cell' when he looked at slices of cork and dead plant cells
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Robert Brown
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observed a dark structure near the center of the cell (nucleus)
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Matthias Schleiden & Theodore Schwann
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stated all plants are made from cells
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Rudolph Virchow
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stated all cells come from the division of preexisting cells
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Lorenz Oken
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stated all new cells are the result of the division of preexisting cells....VIRCHOW STOLE IT!
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Cell Theory
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1) all living things are composed of cells
2) cells are the basic units of structure and function in living things 3) all cells come from preexisting cells |
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Magnification
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image size
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Resolution
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clarity of detail
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Light Microscope
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enables us to see shape and structure of a cell; magnify up to 1,000x
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Electron Microscope
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allows greater magnification and reveals cellular details; magnify up to 2,000,000x; CANNOT OBSERVE LIVING SPECIMENS
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Electron Microscope: Scanning (SEM)
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surface structures
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Electron Microscope: Transmission (TEM)
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inside details
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Prokaryote
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-smallest cells in nature
-DNA not contained in a nucleus, free in cytoplasm -ribosomes are the ONLY cell organelle -Bacteria/Archaebacteria |
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Eukaryote
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-much larger and more complex
-DNA wrapped in a nuclear membrane (nuclear envelope) -MANY cell organelles -Protists, Fungi, Plants, Animals |
