giraffe binomial nomenclature what are the four postulates of natural selection four postulates of natural selection

Name: Biology 1114 Notes Weeks 1 and 2
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Biology 1114 Notes Weeks 1&2 1/10/18 Evolution - a change in allele frequencies over time ● Variations exist in the population before selection ● Populations evolve, not individuals ● Selection is not random ● Changes happen across generations, not within a generation Changes occur in gene frequencies by: ● Mutation ● Random events = genetic drift ● Movement/ migration ● Natural selection What is not evolution? ● Individual development ex. Tadpole to frog ● Ecosystem change ex. Succession ● Cultural evolution History of Evolution ● Essentialism