The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
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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 advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young