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Unit 1: The Chemistry of Life Exploring Life Review
  1. Biology is the scientific study of .
  2. All (most?) living organisms exhibit these properties:
    1. capture from the environment, and to that environment (including of internal environments)
    2. grow and
    3. reproduce using the hereditary material (Deoxyribonucleic Acid)
    4. through a process called .
    5. a high level of as organized in several hierarchical levels:
        , , , , , , , , , , , and .
  3. The cell is the basic unit for life, and contains the hereditary material .
  4. cells contain membrane–enclosed , including a DNA –containing .
  5. cells lack such .
  6. is the branch of biology that names and classifies species according to a system of broader and broader groups, or .
  7. Domain (or Monera) and Domain consist of prokaryotes.
  8. Domain Eukarya, the eukaryotes, includes the various kingdoms and the kingdoms , , and Animalia.
  9. Biologists use various forms of to explore life.
    • In science, scientists describe some aspect of the world and use reasoning to draw general conclusions.
    • In science, scientists use reasoning to form a general hypothesis to explain specific details of the world; this is the method.
      • Observations are used to propose that lead to and then the predictions by seeing if the predictions come true.
      • Hypotheses must be and : the test results should either or the hypothesis.
      • Experiments must be designed to test the effect of one by testing, at the same time, groups and groups that vary in only one variable.
      • If , the hypothesis gains strength and theoretical value. If , the hypothesis is either modified or discarded.
  10. Case study: mimicry.
    • From discovery science: many poisonous animals have ( aposematic ) coloration as a warning to predators. species mimic poisonous ones.
    • Hypothesis: mimics benefit when mistake them for harmful species (Henry Bates , 1862).
    • Prediction: mimicry should protect the king snake from , but only in regions where coral snakes live.
    • 2001: experiment with poisonous eastern snake and mimic scarlet snake.
  11. Good hypotheses lead to new , new questions, and new predictions; science progresses in a of knowledge.
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