The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
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Página vi
... action - Extinction caused by Natural Se- lection - 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 ...
... action - Extinction caused by Natural Se- lection - 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 ...
Página xiv
... action of the physical conditions 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 adaptations ...
... action of the physical conditions 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 adaptations ...
Página xviii
... 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 excellent Description Physique des Isles Canaries ' ( 1836 ...
... 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 excellent Description Physique des Isles Canaries ' ( 1836 ...
Página 8
... action , we must bear in mind that in every case , as Professor Weis- mann 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 organ ...
... action , we must bear in mind that in every case , as Professor Weis- mann 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 organ ...
Página 17
... action of the poor soil ) , that they would , to a large extent , or even wholly , revert to the wild aboriginal stock . Whether or not the experiment would succeed , is not of great importance for our line of argu- ment ; for by the ...
... action of the poor soil ) , that they would , to a large extent , or even wholly , revert to the wild aboriginal stock . Whether or not the experiment would succeed , is not of great importance for our line of argu- ment ; for by the ...
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Términos y frases comunes
adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young