The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, by Charles Darwin, with an Introduction by Edmund B. WilsonMacmillan, 1927 - 557 páginas |
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On the Origin of Species by Means of Natural Selection (World Classics ... Charles Darwin Sin vista previa disponible - 2017 |
Términos y frases comunes
adapted admit affinities allied species analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied color continued crossed crustaceans degree developed difficulty distinct species divergence doubt effects eggs embryo existing extinct extremely facts favorable females fertility flowers formation formerly forms fossil Fritz Müller genera genus geological Glacial period gradations groups of species habits Hence hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organs Origin of Species parent peculiar perfect pigeon pistil pollen present principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend tion trees variability variations varieties vary whole widely different wings young