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
... remarking that rain does not fall in order to make the corn grow , any more than it falls to spoil the farmer's corn when threshed out of doors , applies the same argument to organisation ; and adds ( as translated by Mr. Clair Grece ...
... remarking that rain does not fall in order to make the corn grow , any more than it falls to spoil the farmer's corn when threshed out of doors , applies the same argument to organisation ; and adds ( as translated by Mr. Clair Grece ...
Página xiv
... remarked ( Goethe als Naturforscher , ' von Dr. Karl Meding , s . 34 ) that the future question for naturalists will be how , for instance , cattle got their horns , and not for what they are used . It is rather a singular instance of ...
... remarked ( Goethe als Naturforscher , ' von Dr. Karl Meding , s . 34 ) that the future question for naturalists will be how , for instance , cattle got their horns , and not for what they are used . It is rather a singular instance of ...
Página xv
... remarking that negroes and mulattoes enjoy an immunity from certain tropical diseases , he observes , firstly , that all animals tend to vary in some degree , and , secondly , that agriculturists improve their domesticated animals by ...
... remarking that negroes and mulattoes enjoy an immunity from certain tropical diseases , he observes , firstly , that all animals tend to vary in some degree , and , secondly , that agriculturists improve their domesticated animals by ...
Página 7
... remarked , between the variability which follows from the crossing of distinct species , and that which may be observed with plants and animals when reared under new or unnatural conditions Many facts clearly show how eminently ...
... remarked , between the variability which follows from the crossing of distinct species , and that which may be observed with plants and animals when reared under new or unnatural conditions Many facts clearly show how eminently ...
Página 12
... remarked , less uniformity of character than in true species . Domestic races often have a somewhat monstrous character ; by which I mean , that , although differing from each other , and from other species of the same genus , in ...
... remarked , less uniformity of character than in true species . Domestic races often have a somewhat monstrous character ; by which I mean , that , although differing from each other , and from other species of the same genus , in ...
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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