The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
From inside the book
Results 1-5 of 69
Page xxii
... observation des animaux sauvages démontre déjà la variabilité limitée des espèces . Les expériences sur les animaux sauvages , devenus domestiques , et sur les animaux domestiques redevenus sauvages , la démon- trent plus clairement ...
... observation des animaux sauvages démontre déjà la variabilité limitée des espèces . Les expériences sur les animaux sauvages , devenus domestiques , et sur les animaux domestiques redevenus sauvages , la démon- trent plus clairement ...
Page xxvi
... many original observations . The first edition of this work was published on No- vember 24th , 1859 , and the second edition on January 7th , 1860 . ORIGIN OF SPECIES . INTRODUCTION . " WHEN on board xxvi HISTORICAL SKETCH .
... many original observations . The first edition of this work was published on No- vember 24th , 1859 , and the second edition on January 7th , 1860 . ORIGIN OF SPECIES . INTRODUCTION . " WHEN on board xxvi HISTORICAL SKETCH .
Page 4
... observations it seemed to me probable that a careful study of domes- ticated animals and of cultivated plants would offer the best chance of making out this obscure problem . Nor have I been disappointed ; in this and in all other per ...
... observations it seemed to me probable that a careful study of domes- ticated animals and of cultivated plants would offer the best chance of making out this obscure problem . Nor have I been disappointed ; in this and in all other per ...
Page 10
... observed with plants and ani- mals when reared under new or unnatural condi- tions . Many facts clearly show how eminently sus- ceptible the reproductive system is to very slight changes in the surrounding conditions . Nothing is more ...
... observed with plants and ani- mals when reared under new or unnatural condi- tions . Many facts clearly show how eminently sus- ceptible the reproductive system is to very slight changes in the surrounding conditions . Nothing is more ...
Page 30
... observations , purposely made , on the most distinct breeds . Now , hardly any cases have been ascertained with certainty of hybrids from two quite distinct species of animals being perfectly fertile . Some authors believe that long ...
... observations , purposely made , on the most distinct breeds . Now , hardly any cases have been ascertained with certainty of hybrids from two quite distinct species of animals being perfectly fertile . Some authors believe that long ...
Other editions - View all
Common terms and phrases
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