Biology 2483A Lecture Notes - Lecture 5: Disruptive Selection, Sympatric Speciation, Guppy
3 Nov 2017
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Document Summary
Things that move slowly through great period of time. That natural selection will always act with extreme slowness"". 1: evolution can be viewed as genetic change over time or as a process of descent with modification. 2: natural selection, genetic drift, and gene flow can cause allele frequencies in a population to change over time. 3: natural selection is the only evolutionary mechanism that consistently causes adaptive evolution. 4: long-term patterns of evolution are shaped by large- scale processes such as speciation, mass extinction, and adaptive radiation. 5: ecological interactions and evolution exert a profound influence on one another. Concept 6. 4: long-term patterns of evolution are shaped by large-scale processes such as speciation, mass extinction, and adaptive radiation. Species: isolated from other population and reproduction among itself within the population. Separation over time between parental species and daughter species. Estimated over 8 million species (not all defined) Genetic divergence of populations over time can lead to speciation.
