Charles Darwin: Evolution by Natural Selection

adaptation ancestors Archipelago argument Asa Gray atolls barnacles barrier-reefs become birds blending inheritance breeds causes Chapter containing coral coral-reefs Cuvier Darwin found Darwin was able Darwin wrote deposits descended effects elevation embryo environment Erasmus Darwin Essay evidence existence experiments explain extinct fact feet fertile FitzRoy flowers formation forms fortuitous fossil Fuegians Galapagos gene-complex genera genes genetic geological H.M.S. Beagle Henslow heritable variation Hooker Huxley important inhabitants insects Lamarck land living Lyell Malthus Malthus's mammals mutation natural history natural selection naturalist never Notebooks on Transmutation observations oceanic islands offspring orchids organisms Origin of Species Paley parents plants and animals pollen pollinium population principle problem produced progressionism published R. A. Fisher recessive gene result rocks sailed seeds shells South America St Paul's Rocks structure subsidence theory of evolution thought tion transmutation of species trees uniformitarianism varieties volcanic voyage Zoönomia