Biology CH 4,5,8

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Anonymous
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63945
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Biology CH 4,5,8
Updated:
2011-02-03 17:08:22
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Biology
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Chapters 4,5,8
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  1. What two types of microscopes do scientists use to observe cells? What is the difference between these two microscopes?
    Light microscopes - Used to view cells but not in much detail

    Electron Microscopes - Allow the structure of cells to be viewed in greater detail
  2. What is the cell theory?
    - The cell is th basic unit of an organism - All organisms are composed of cells - Cells come only from preexisting cells
  3. How do cells benefit by having a high surface to volume ratio?
    -A cell needs a relatively large surface area for efficient absorption of nutrients and secretion of wastes
  4. Compare and contrast eukaryotic and prokaryotic cells.
    • Eukaryotic - have membrane-bound organelles
    • Prokaryotic - lack membrane-bound organelles

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