title: Biological evolution: natural selection or random walk?
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004330:Drosophila; D004592:Electrophoresis, Starch Gel; D014644:Genetic Variation; D005823:Genetics; D005838:Genotype; D006801:Humans; D011110:Polymorphism, Genetic; D013045:Species Specificity