Ch 1

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Author:
khonka
ID:
41606
Filename:
Ch 1
Updated:
2010-10-12 04:18:01
Tags:
Bio
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Description:
the intro to biology
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  1. Science
    • a body of learning about the natural world.
    • a collection of unified insights about the nature
    • supported by facts
    • stated as theories
  2. Scientific method
    • System of answring questions
    • observation
    • question
    • hypothesis
    • experimentation
    • analysis/conclusion
  3. Theory
    • is a general set of principles (predpolozhenii)
    • supported by evidence, that explains some aspects of nature
  4. Hypothesis
    • are possible explanations of observations
    • several can be proposed
    • must be testable
    • Must be falcifiable (open to negation through inquiry/testing)
  5. How do we get theories
    • observation
    • formulation and testing of hypotheses
    • repeated experimentation
    • results must be reproducible
  6. Variable
    and adjustable condition in an experiment
  7. Experimental variable
    the variable that is changed or manipulated
  8. Controlled condition
    all variables should be held constant "controlled" except for the experimental variable
  9. Biology
    study of life
  10. Characteristics of living things
    • assimilate/use energy
    • respond to their environment
    • constant internal environment (homeostatis)
    • reproduction
    • composed of one or more cells
    • highly orgonized
  11. Homoestasis
    Maintenance of a stable, internal environment
  12. Levels of organization
    atom - molecule - organelle - cell - tissue - organ - organ system - organism (human, lion) - population - community - ecosystem - biosphere (earth)
  13. Evolution
    gradual change in populations over time

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