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Chapter 1: Exploring Life 1.1 - 1.6

Chapter 1: Exploring Life 1.1 - 1.6. Unifying Themes in Biology. Evolution ~ biology’s core theme; differential reproductive success (sex!) Emergent Properties ~ hierarchy of life The Cell ~ all organism’s basic structure Heritable Information ~ DNA

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Chapter 1: Exploring Life 1.1 - 1.6

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  1. Chapter 1: Exploring Life • 1.1 - 1.6

  2. Unifying Themes in Biology • Evolution~ biology’s core theme; differential reproductive success (sex!) • Emergent Properties~ hierarchy of life • The Cell~ all organism’s basic structure • Heritable Information~ DNA • Structure & Function~ form and function • Environmental Interaction~ organisms are open systems • Regulation~ feedback mechanisms • Unity & Diversity~ universal genetic code • Scientific Inquiry~ observation; testing; repeatability • Science, Technology & Society~ functions of our world

  3. Hierarchy of Organization • Molecule • Organelle • Cells • Tissues • Organ • Organism

  4. Feedback Regulation: Negative • Accumulation of an end product of a process slows that process • Example: sugar breakdown generates ATP; excess ATP inhibits an enzyme near the beginning of the pathway

  5. Feedback Regulation: Positive • An end product speeds up its production • Example: blood clotting in response to injury

  6. The Process of Science • The Scientific Method • Hypothetico-deductive reasoning • “If….then” Logic • Hypothesis vs. Theory

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