Chpt1 lesson 3.txt

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  1. Cell?
    Collection of living matter and closed by a barrier that separates the cell from its surroundings.
  2. Sexual reproduction:
    To cells from different parents unite to produce first cells of the new organism.
  3. Asexual reproduction:
    The new organism has a single parent.
  4. Metabolism:
    Combination of chemical reactions through which an organism builds up or breaks down materials.
  5. Stimulus:
    a signal to which an organism responds.
  6. Homeostasis:
    The process by which organisms keep internal conditions such as temperature and water content, constant to survive.
  7. Evolution:
    The ability of a group of organisms to change over time.
  8. Branches of biology:
    Some of the levels which life can be studied include molecules, cells, organisms, population of single kinds of organisms, communities of different organisms in an area and the biosphere.
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Chpt1 lesson 3.txt

studying life
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