The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for LifeD. Appleton, 1904 - 435 páginas |
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Página xi
... as always maintained in this work . The belief in the separate creation of species gen- erally held by naturalists , until a recent period . " But with regard to the material world , we ADDITIONS AND CORRECTIONS . xi.
... as always maintained in this work . The belief in the separate creation of species gen- erally held by naturalists , until a recent period . " But with regard to the material world , we ADDITIONS AND CORRECTIONS . xi.
Página xiii
... naturalists believed that species were immutable productions , and had been separately created . This view has been ably maintained by many authors . Some few naturalists , on the other hand , have believed that species undergo ...
... naturalists believed that species were immutable productions , and had been separately created . This view has been ably maintained by many authors . Some few naturalists , on the other hand , have believed that species undergo ...
Página xv
... naturalists will be how , for instance , cattle got their horns , and not for what they are used . It is rather a singular instance of the manner in which similar views arise at about the same time , that Goethe in Germany , Dr. Darwin ...
... naturalists will be how , for instance , cattle got their horns , and not for what they are used . It is rather a singular instance of the manner in which similar views arise at about the same time , that Goethe in Germany , Dr. Darwin ...
Página 3
... naturalists , some of them personally unknown to me . I cannot , however , let this opportunity pass without expressing my deep obligations to Dr. Hooker , who , for the last fifteen years , has aided me in every possible way by his ...
... naturalists , some of them personally unknown to me . I cannot , however , let this opportunity pass without expressing my deep obligations to Dr. Hooker , who , for the last fifteen years , has aided me in every possible way by his ...
Página 4
... naturalists . From these considerations , I shall devote the first chapter of this Abstract to Variation under Domesti- cation . We shall thus see that a large amount of hereditary modification is at least possible ; and , what is ...
... naturalists . From these considerations , I shall devote the first chapter of this Abstract to Variation under Domesti- cation . We shall thus see that a large amount of hereditary modification is at least possible ; and , what is ...
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Términos y frases comunes
adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young