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Biology: What Is the Study of Life?
Why Study Biology?




• Two important reasons for studying Biology:
   – Biology is relevant to our everyday experience
      • Medical advances
      • Addressing needs of growing human population
      • Challenges of decreasing rate of biodiversity
      • Biotechnology advances
Why Study Biology?
– Biology can be
  controversial                Figure 1-1c
   • Examples:
      – Dealing with
        endangered
        species?
      – Use of human fetal
        tissue in biomedical
        research?
      – Safety of irradiated
        foods?
What is Biology?
• It is the study of life.
• Branch of science
   – A way of understanding nature.
• A human endeavor
   – An attempt to understand, explain, integrate
     and describe the world of living things.
What is Life?
• Living organisms:
  – Highly organized and
    complex.
  – Are composed of one
    or more cells.
  – Contain a blueprint of
    their characteristics.
  – Acquire and use
    energy.
  – Carry out and control
    numerous reactions.
What is Life?
• Living organisms:
  – Grow.                   Insert F01_03b
  – Maintain constant
    internal environment.
  – Produce offspring.
  – Respond to
    environmental
    changes.
  – May evolve.
Biology is a Branch of Science
• Both an activity and body of knowledge.
• A way of understanding the natural world.
  – Scientists make predictions and test those
    predictions.
Major Themes in Biology
• Evolution by Natural
  Selection
• Inheritance
• Cells
• Biological
  Classification
• Bioenergetics
• Homeostasis
• Ecosystems
How is Biology studied?
            Insert F01-06
Scientific Method
• Begins with
  observations about
  our surroundings.

• Next, ask questions
  about the phenomena
  we are observing.
Scientific Method
• Followed by
  generating a
  hypothesis.
  – Tentative explanation
    to the question.
Scientific Method
• Testing
  – Scientists perform
    tests to determine the
    accuracy of their
    hypothesis.
Scientific Method
• Explanation
  – It is a hypothesis that
    has passed the widest
    and most
    comprehensive series
    of tests.
  – Still subject to review
    and consideration.
  – May be elevated to a
    theory = well
    demonstrated
    principle.

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what is life ppt_ch01

  • 1. Biology: What Is the Study of Life?
  • 2. Why Study Biology? • Two important reasons for studying Biology: – Biology is relevant to our everyday experience • Medical advances • Addressing needs of growing human population • Challenges of decreasing rate of biodiversity • Biotechnology advances
  • 3. Why Study Biology? – Biology can be controversial Figure 1-1c • Examples: – Dealing with endangered species? – Use of human fetal tissue in biomedical research? – Safety of irradiated foods?
  • 4. What is Biology? • It is the study of life. • Branch of science – A way of understanding nature. • A human endeavor – An attempt to understand, explain, integrate and describe the world of living things.
  • 5. What is Life? • Living organisms: – Highly organized and complex. – Are composed of one or more cells. – Contain a blueprint of their characteristics. – Acquire and use energy. – Carry out and control numerous reactions.
  • 6. What is Life? • Living organisms: – Grow. Insert F01_03b – Maintain constant internal environment. – Produce offspring. – Respond to environmental changes. – May evolve.
  • 7. Biology is a Branch of Science • Both an activity and body of knowledge. • A way of understanding the natural world. – Scientists make predictions and test those predictions.
  • 8. Major Themes in Biology • Evolution by Natural Selection • Inheritance • Cells • Biological Classification • Bioenergetics • Homeostasis • Ecosystems
  • 9. How is Biology studied? Insert F01-06
  • 10. Scientific Method • Begins with observations about our surroundings. • Next, ask questions about the phenomena we are observing.
  • 11. Scientific Method • Followed by generating a hypothesis. – Tentative explanation to the question.
  • 12. Scientific Method • Testing – Scientists perform tests to determine the accuracy of their hypothesis.
  • 13. Scientific Method • Explanation – It is a hypothesis that has passed the widest and most comprehensive series of tests. – Still subject to review and consideration. – May be elevated to a theory = well demonstrated principle.