The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeJohn Murray, Albemarle Street., 1891 - 432페이지 |
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xiv 페이지
... similar views , as shown in the Introduction to a work written in 1794 and 1795 , but not published till long afterwards : he has pointedly remarked ( Goethe als Naturforscher , ' von Dr. Karl Meding , s . 34 ) that the future question ...
... similar views , as shown in the Introduction to a work written in 1794 and 1795 , but not published till long afterwards : he has pointedly remarked ( Goethe als Naturforscher , ' von Dr. Karl Meding , s . 34 ) that the future question ...
xix 페이지
... similar belief . Similar views have , as is well known , been maintained by Oken in his mystical Natur - Philosophie . ' From other In 1853 a celebrated geologist , Count Keyserling ( '. HISTORICAL SKETCH . xix.
... similar belief . Similar views have , as is well known , been maintained by Oken in his mystical Natur - Philosophie . ' From other In 1853 a celebrated geologist , Count Keyserling ( '. HISTORICAL SKETCH . xix.
6 페이지
... similar variations sometimes arise under , as far as we can judge , dissimilar conditions ; and , on the other hand , dissimilar variations arise under conditions which appear to be nearly uniform . The effects on the offspring are ...
... similar variations sometimes arise under , as far as we can judge , dissimilar conditions ; and , on the other hand , dissimilar variations arise under conditions which appear to be nearly uniform . The effects on the offspring are ...
16 페이지
... supposed extermination of so many species having similar habits with the rock - pigeon seems a very rash assumption . Moreover , the several above - named domesticated breeds have been transported to all. 16 [ CHAP . I. DOMESTIC PIGEONS .
... supposed extermination of so many species having similar habits with the rock - pigeon seems a very rash assumption . Moreover , the several above - named domesticated breeds have been transported to all. 16 [ CHAP . I. DOMESTIC PIGEONS .
20 페이지
... similar conclusion in regard to the many species of finches , or other groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the various domestic animals and the cultivators of ...
... similar conclusion in regard to the many species of finches , or other groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the various domestic animals and the cultivators of ...
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accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely facts favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase 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 resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young