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The Common Sense of the Evolution Question i
z The MakeUp and the Workings of the Earth
Resemblances and Differences Among Living Things
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adaptation ancestors appearance assume assumption birds body breeding characteristics characters chemical chromosomes color common corresponding course Cuvier Darwin descent distinct divergence doctrine dominant earth embryo environment evolution example experimental experiments explain eyes factors facts female fish flowers forms fossils frog fruit fly gametes gene germ cells germ plasm heredity human hybrid individual inherited insects kind Lamarck large numbers layers legs living things male mammals material mechanism Mendel modifications mutation theory mutations natural selection normal observed offspring organs origin Origin of Species orthogenesis pair parental type pigmentation plant or animal plants and animals possible primitive principle produce proportions protoplasm race recessive reproduce resemblances result rocks scientist seeds sense species sperm stage strains structure theory tion traits trochophore variations variety various W. E. Castle wings worm X chromosome