BiologyNov13th2006 - chemicals between the cell and its...

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Dustin Lee 11/13/2006 Biology Block C 1. In 1665, an English scientist named Robert Hooke observed “compartments” in a thin slice of cork (oak bark) using a light microscope. 2. Light microscopes are useful for magnifying objects up to about 1000 times their actual size. Scanning electron microscopes are used to study the surface structures of cells. Micrographs are used as a notation alongside the image that indicates the kind of microscope used to view the object and its final magnification. 3. Both animal and plant cells have a thin outer covering called the plasma membrane, which defines the boundary of the cell and regulates the traffic of
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Unformatted text preview: chemicals between the cell and its surroundings. Each cell also has a prominent nucleus, which houses the cell’s genetic material in the form of DNA. Some key differences include the presence of chloroplasts in some plant cells in which photosynthesis occurs. The cell wall protects the plant cell and maintains its shape. 4. A prokaryotic cell lacks a nucleus and most other organelles. A eukaryotic cell has a nucleus surrounded by its own membrane, and has other internal organelles bounded by membranes....
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