The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for LifeWerner Company, Book Manufacturers, 1900 - 538페이지 |
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72 페이지
... parent - species . Undoubtedly there is one most important point of dif- ference between varieties and species ; namely , that the amount of difference between varieties , when compared with each other or with their parent - species ...
... parent - species . Undoubtedly there is one most important point of dif- ference between varieties and species ; namely , that the amount of difference between varieties , when compared with each other or with their parent - species ...
142 페이지
... parent ( A ) more nu- merous than most of the other inhabitants of the same country ; they will also partake of those more general advantages which made the genus to which the parent- species belonged , a large genus in its own country ...
... parent ( A ) more nu- merous than most of the other inhabitants of the same country ; they will also partake of those more general advantages which made the genus to which the parent- species belonged , a large genus in its own country ...
195 페이지
... parent : if this be not so , the case will then be one of analogous variation in two so- called distinct species ; and to these a third may be add- ed , namely , the common turnip . According to the or- dinary view of each species ...
... parent : if this be not so , the case will then be one of analogous variation in two so- called distinct species ; and to these a third may be add- ed , namely , the common turnip . According to the or- dinary view of each species ...
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adapted advantage allied 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 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 individuals 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 Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young