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311Caug25post - 1 Course organization 2 Properties of life...

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8/25/10 1 8/25/10 1. Course organization 2. Properties of life 3. Predict cell properties from molecular 4. Electronegativity and covalent bonds Properties of life, text figure 1.3 Order Evolutionary adaptation Response to environment Regulation Energy processing Growth and development Reproduction This is a biology class. Biology is the study of life So, what is life? Or, rather, what are the properties of living organisms? Evolution by natural selection (on your syllabus): There is genetic-based variation in a population Individuals with certain traits have greater reproductive fitness in a given environment As a result, there is change in the population over time. Adaptations are products of evolution by natural selection. Levels of Biological Organization (Fig 1.4) Biosphere Ecosystems Communities Populations Organisms Organs, organ systems Tissues Cells Organelles Molecules Predicting cell structure and function on the basis of its molecules:
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