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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vi 페이지
... action - Extinction caused by Natural Selection- Divergence of Character , related to the diversity of inhabitants of any small area , and to naturalisation - Action of Natural Selection , through divergence of Character and Extinction ...
... action - Extinction caused by Natural Selection- Divergence of Character , related to the diversity of inhabitants of any small area , and to naturalisation - Action of Natural Selection , through divergence of Character and Extinction ...
xiv 페이지
... action of the physical condi- tions of life , something to the crossing of already existing forms , and much to use and disuse , that is , to the effects of habit . To this latter agency he seems to attribute all the beautiful adapta ...
... action of the physical condi- tions of life , something to the crossing of already existing forms , and much to use and disuse , that is , to the effects of habit . To this latter agency he seems to attribute all the beautiful adapta ...
xvi 페이지
... action of the conditions of life . He clearly saw , however , the full force of the principle of natural selection . The celebrated geologist and naturalist , Von Buch , in his excel- lent ' Description Physique des Isles Canaries ...
... action of the conditions of life . He clearly saw , however , the full force of the principle of natural selection . The celebrated geologist and naturalist , Von Buch , in his excel- lent ' Description Physique des Isles Canaries ...
xix 페이지
... action inces- sante sur les êtres vivants détermine , à toutes les époques de l'existence du monde , la forme , le volume , et la durée de chacun d'eux , en raison de sa destinée dans l'ordre de choses dont il fait partie . C'est cette ...
... action inces- sante sur les êtres vivants détermine , à toutes les époques de l'existence du monde , la forme , le volume , et la durée de chacun d'eux , en raison de sa destinée dans l'ordre de choses dont il fait partie . C'est cette ...
5 페이지
... action , we must bear in mind that in every case , as Professor Weismann has lately insisted , and as I have incidentally shown in my work on Variation under Domestication , ' there are two factors : namely , the nature of the organism ...
... action , we must bear in mind that in every case , as Professor Weismann has lately insisted , and as I have incidentally shown in my work on Variation under Domestication , ' there are two factors : namely , the nature of the organism ...
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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