lecture3_handout - BioG1780 Evolution and Biodiversity...

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BioG1780 Fall 2010 Evolution and Biodiversity Today’s lecturer: Kelly Zamudio Lecture 3: August 30, 2010 1 The Darwinian Revolution, Then Till Now Origins of Evolutionary Theory Evidence for Evolution This lecture links to parts 1-3 of textbook chapter 2. It covers the scientific framework that we use to understand evolution and other features of the natural world, a brief history of the origins of evolutionary science, and some of the many lines of evidence that Darwin and later biologists have marshaled in support of evolutionary thinking. The Nature of Science Theory, Hypothesis, & Fact o In the technical language of science these terms have specific meaning which can differ from common usage o These terms have a special relationship to each other in the context of scientific knowledge and inference Definitions: o Theory Scientific usage: A coherent group of general propositions used as principles of explanation for a class of phenomena Common usage: A proposed explanation whose status is still considered conjectural o Hypothesis Scientific Usage: A tentative explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation Common usage is the same. Note similarity to the common definition of theory. o Fact Something that has actual existence: a matter of objective reality The nature of science o Facts are used to test hypotheses. They are interpreted in the context of theory
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This note was uploaded on 12/20/2010 for the course BIOEE 2780 at Cornell University (Engineering School).

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lecture3_handout - BioG1780 Evolution and Biodiversity...

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