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Unformatted text preview: But most populations remain relatively constant Therefore, there is a struggle for existence Variations among individuals Survival of the fittest by means of natural selection Inheritance of acquired characteristics Speciation Modern Points Stress populations over individuals Cannot inherit acquired characteristics, can only inherit genetic characteristics Evidence of evolution Fossils Comparative anatomy homologous structures 2 structures derived from a common ancestral structure 1/2 homologous = same appearance Analogous = same function Species: populations of organisms capable of interbreeding under natural conditions and producing fertile offspring Hybrid infertility Coevolution: evolution of one species is directed by evolution of second species. 2/2...
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