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LECTURE_5_Earth_Systems_EcoSystems_v2 - LECTURE 5 EARTH...

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LECTURE 5: EARTH SYSTEMS, ECOSYSTEMS Lecture Goals After today, you should be able to… Define species using two common species concepts Explain how life is categorized and named Explain the significance of biological classification to conservation Explain how the extinction of one species puts other species at risk Define the terms food web and food chain Distinguish between niche and habitat Distinguish between ecosystem, community, and population Describe the influence of the environment on current species distributions and past extinctions Third assignment (Climate Change Evidence) due next week
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WEEK 2 RECAP Evolution! Role of variation, inheritance, and time Sources of biological variation in populations Interpret evolutionary relationships of species Evolutionary mechanisms natural selection and genetic drift Evidence for evolution Scientific definition of “theory”
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Evolutionary Change Reproductive Isolation New Species How long does it take?
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Biological Species Concept Morphological Species Concept But what’s a species?
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Categorizing Life Carl Linnaeus (1707-1778)
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Categorizing Life Carl Linnaeus (1707-1778) Classification system predates Darwin and evolutionary theory
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