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 ix
... according as the evidence has become somewhat stronger or weaker . The more important corrections and some additions in the present volume are tabulated on the following page , for the convenience of those interested in the subject ...
... according as the evidence has become somewhat stronger or weaker . The more important corrections and some additions in the present volume are tabulated on the following page , for the convenience of those interested in the subject ...
Página xv
... According to Isid . Geoffroy there is no doubt that Goethe was an extreme partisan of similar views , as shown in the Intro- duction to a work written in 1794 and 1795 , but not published till long afterwards : he has pointedly remarked ...
... According to Isid . Geoffroy there is no doubt that Goethe was an extreme partisan of similar views , as shown in the Intro- duction to a work written in 1794 and 1795 , but not published till long afterwards : he has pointedly remarked ...
Página 45
... perhaps more at one period than at another , as the breed rises or falls in fashion , perhaps more in one district than in añ- other , according to the state of civilisation of the CHAP . I. ] 45 UNCONSCIOUS SELECTION .
... perhaps more at one period than at another , as the breed rises or falls in fashion , perhaps more in one district than in añ- other , according to the state of civilisation of the CHAP . I. ] 45 UNCONSCIOUS SELECTION .
Página 46
... according to the state of civilisation of the in- habitants , slowly to add to the characteristic features of the breed , whatever they may be . But the chance will be infinitely small of any record having been preserved of such slow ...
... according to the state of civilisation of the in- habitants , slowly to add to the characteristic features of the breed , whatever they may be . But the chance will be infinitely small of any record having been preserved of such slow ...
Página 62
... according to age or development , sometimes without any assignable reason . Such characters are not of course of specific value , but they are , as Asa Gray has remarked in commenting on this memoir , such as generally enter into ...
... according to age or development , sometimes without any assignable reason . Such characters are not of course of specific value , but they are , as Asa Gray has remarked in commenting on this memoir , such as generally enter into ...
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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