On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, Volumen2D. Appleton, 1888 - 458 páginas |
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Página xii
... existing groups . On earth adhering to the feet of migratory birds . On the wide geographical range of a species of Galaxias , a fresh - water fish . Discussion on analogical resemblances , enlarged and modified . 382 Homological ...
... existing groups . On earth adhering to the feet of migratory birds . On the wide geographical range of a species of Galaxias , a fresh - water fish . Discussion on analogical resemblances , enlarged and modified . 382 Homological ...
Página xiii
... existing forms of life are the descendants by true generation of pre - existing forms . Passing over allusions to the subject in the classical writers , * the first author who in modern times has treated it in a scientific spirit was ...
... existing forms of life are the descendants by true generation of pre - existing forms . Passing over allusions to the subject in the classical writers , * the first author who in modern times has treated it in a scientific spirit was ...
Página xiv
... existing forms , and much to use and disuse , that is , to the effects of habit . To this latter agency he seems to attribute all the beautiful adaptations in nature ; —such as the long neck of the giraffe for browsing on the branches ...
... existing forms , and much to use and disuse , that is , to the effects of habit . To this latter agency he seems to attribute all the beautiful adaptations in nature ; —such as the long neck of the giraffe for browsing on the branches ...
Página xv
... existing , a darker and a darker race would in the course of time occur : and as the darkest would be the best fitted for the climate , this would at length become the most prevalent , if not the only race , in the particular country in ...
... existing , a darker and a darker race would in the course of time occur : and as the darkest would be the best fitted for the climate , this would at length become the most prevalent , if not the only race , in the particular country in ...
Página xx
... existing species may have been chemically affected by circum- ambient molecules of a particular nature , and thus have given rise to new forms . In this same year , 1853 , Dr. Schaaffhausen published an ex- cellent pamphlet ( Verhand ...
... existing species may have been chemically affected by circum- ambient molecules of a particular nature , and thus have given rise to new forms . In this same year , 1853 , Dr. Schaaffhausen published an ex- cellent pamphlet ( Verhand ...
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Términos y frases comunes
adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids 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 organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young