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 xiii
... give a brief sketch of the progress of opinion on the Origin of Species . Until recently the great majority of naturalists believed that species were immutable productions , and had been separately created . This view has been ably ...
... give a brief sketch of the progress of opinion on the Origin of Species . Until recently the great majority of naturalists believed that species were immutable productions , and had been separately created . This view has been ably ...
Página xix
... gives his reason for believing that specific characters " sont fixés , pour chaque espèce , tant qu'elle se perpétue au ... give any idea of his views would be superfluous on my part . Mr. Herbert Spencer , in an Essay ( originally ...
... gives his reason for believing that specific characters " sont fixés , pour chaque espèce , tant qu'elle se perpétue au ... give any idea of his views would be superfluous on my part . Mr. Herbert Spencer , in an Essay ( originally ...
Página 1
... give them to show that I have not been hasty in coming to a decision . My work is now ( 1859 ) nearly finished ; but as it will take me many more years to complete it , and as my health is far from strong , I have been urged to publish ...
... give them to show that I have not been hasty in coming to a decision . My work is now ( 1859 ) nearly finished ; but as it will take me many more years to complete it , and as my health is far from strong , I have been urged to publish ...
Página 4
... give a brief recapitulation of the whole work , and a few concluding remarks . No one ought to feel surprise at much remaining as yet un- explained in regard to the origin of species and varieties , if he make due allowance for our ...
... give a brief recapitulation of the whole work , and a few concluding remarks . No one ought to feel surprise at much remaining as yet un- explained in regard to the origin of species and varieties , if he make due allowance for our ...
Página 7
... give the details which I have collected and elsewhere published on this curious subject ; but to show how singular the laws are which determine the repro- duction of animals under confinement , I may mention that car- nivorous animals ...
... give the details which I have collected and elsewhere published on this curious subject ; but to show how singular the laws are which determine the repro- duction of animals under confinement , I may mention that car- nivorous animals ...
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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