Test 1 Notes - Speciation

Test 1 Notes - Speciation - The Origin of Species...

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The Origin of Species Principles of Biology II Georgia Southern University Leege Speciation, the origin of new species, is at the focal point of evolutionary theory Evolutionary theory must explain how new species originate and how populations evolve Microevolution consists of adaptations that evolve within a population, confined to one gene pool Macroevolution refers to evolutionary change above the species level Two basic patterns of evolutionary change: Anagenesis (phyletic evolution) transforms one species into another Cladogenesis (branching evolution) is the splitting of a gene pool, giving rise to one or more new species Concept 24.1: The biological species concept emphasizes reproductive isolation Species is a Latin word meaning "kind" or "appearance" The Biological Species Concept Members of a biological species are reproductively compatible, at least potentially; they cannot interbreed with other populations. Reproductive Isolation Biological factors (barriers) that impede two species from producing viable, fertile hybrids
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Test 1 Notes - Speciation - The Origin of Species...

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