The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life, Volume 1 |
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Page 10
... action of changed conditions , namely , through the reproductive system of being affected , we may infer that variability is thus induced , partly from the fact of this system being extremely sensitive to any change in the conditions ...
... action of changed conditions , namely , through the reproductive system of being affected , we may infer that variability is thus induced , partly from the fact of this system being extremely sensitive to any change in the conditions ...
Page 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 argument ; 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 argument ; for by the ...
Page 34
... action of the external conditions of life , and some to habit ; but he would be a bold man who would account by such agencies for the differences between a dray- and race- horse , a greyhound and bloodhound , a carrier and tumbler ...
... action of the external conditions of life , and some to habit ; but he would be a bold man who would account by such agencies for the differences between a dray- and race- horse , a greyhound and bloodhound , a carrier and tumbler ...
Page 49
... do not know , may be attributed to the definite action of the conditions of life . Some , perhaps a great , effect may VOL . I .. E be attributed to the increased use or disuse of parts CIRCUMSTANCES FAVOURABLE TO SELECTION . 49.
... do not know , may be attributed to the definite action of the conditions of life . Some , perhaps a great , effect may VOL . I .. E be attributed to the increased use or disuse of parts CIRCUMSTANCES FAVOURABLE TO SELECTION . 49.
Page 50
... action of Selection , whether applied methodically and quickly , or unconsciously and slowly but more efficiently , seems to have been the predominant Power . CHAPTER II . VARIATION UNDER NATURE . Variability - Individual 50 [ CHAP . I ...
... action of Selection , whether applied methodically and quickly , or unconsciously and slowly but more efficiently , seems to have been the predominant Power . CHAPTER II . VARIATION UNDER NATURE . Variability - Individual 50 [ CHAP . I ...
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Common terms and phrases
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 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 improved increase in number individual differences inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less likewise males manner Melipona Mivart natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species perfect period pigeons pollen pollen-grains present preserved principle probably produced progenitor quadrupeds rank Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens structure struggle supposed swimbladder tend tendency tion transitional tree variability variations varieties vary widely wings young