Biology3 the cell

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Biology3 the cell
2012-04-13 18:27:01
Biology3 cell

Biology3 the cell
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  1. cell theory, 4 generalizations:
    • 1. all living organisms are made up of cells
    • 2. smallest living organism is one cell, multicellular organism made up of many cells woking together.
    • 3. all cells came from preexisting cells
    • 4. cells contain hereditary material (DNA) that is passed on to cells they produce
  2. cell
    fundamental unit of life
  3. 8 characteristics of life
    • complex/organized
    • growth/develop
    • metabolize
    • reproduce
    • evolves
    • responds to stimuli
    • homeostasis
    • DNA
  4. surface area
    the sum of all the areas of all the shapes that cover the surface of the area
  5. volume
    the amount of space, measured in cubic units, that an object or substance occupies
  6. 2 types of cells:
    • prokaryotic: do not have a membrane-bound nucleus. (only single-cell organisms; the bacteria and Archaea)
    • have no membrane enclosed organelles
    • eukaryotic: possess a membrane enclosed nucleus
    • organelles
    • cytoskeleton
    • 2 types, animal and plant
  7. organelles
    • membrane bound structures within the cell
    • each with its own function
  8. cytoskeleton
    • network of protein fibers
    • gives shape to cell and many arganelles attach to it
  9. animal vs plant cells
    • animal: lysosomes, centrioles, flagella
    • plant: chloroplast, central vacuole, tonoplast