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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9 페이지
... individuals , all probably would be modified in the same manner . Such facts as the com- plex and extraordinary out - growths which invariably fol- low from the insertion of a minute drop of poison by a gall - producing insect , show us ...
... individuals , all probably would be modified in the same manner . Such facts as the com- plex and extraordinary out - growths which invariably fol- low from the insertion of a minute drop of poison by a gall - producing insect , show us ...
53 페이지
... individual differences . No one supposes that all the individuals of the same species are cast in the same actual mould . These in- dividual differences are of the highest importance for us , for they are often inherited , as must be ...
... individual differences . No one supposes that all the individuals of the same species are cast in the same actual mould . These in- dividual differences are of the highest importance for us , for they are often inherited , as must be ...
113 페이지
... individuals of the same species have been similarly modified without the aid of any form of selection . Or only a third , fifth , or tenth part of the individuals may have been thus affected , of which fact several instances could be ...
... individuals of the same species have been similarly modified without the aid of any form of selection . Or only a third , fifth , or tenth part of the individuals may have been thus affected , of which fact several instances could be ...
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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