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 30
... respects ; -the occasional re - appearance of the blue colour and various black marks in all the breeds , both when kept pure and when crossed ; -and lastly , the mongrel offspring being perfectly fertile ; -from these several reasons ...
... respects ; -the occasional re - appearance of the blue colour and various black marks in all the breeds , both when kept pure and when crossed ; -and lastly , the mongrel offspring being perfectly fertile ; -from these several reasons ...
Page 47
... respect enclosure of the land plays a part . Wandering savages or the inhabitants of open plains rarely possess more than one breed of the same species . Pigeons can be mated for life , and this is a great convenience to the fancier ...
... respect enclosure of the land plays a part . Wandering savages or the inhabitants of open plains rarely possess more than one breed of the same species . Pigeons can be mated for life , and this is a great convenience to the fancier ...
Page 56
... respects the most important for us . We have every reason to believe that many of these doubtful and closely allied forms have permanently retained their characters for a long time ; for as long , as far as we know , as have good and ...
... respects the most important for us . We have every reason to believe that many of these doubtful and closely allied forms have permanently retained their characters for a long time ; for as long , as far as we know , as have good and ...
Page 65
... respect to the more important and adaptive characters , the passage from one stage of difference to another , may be safely attributed to the cumulative action of natural selection , hereafter to be explained , and to the effects of the ...
... respect to the more important and adaptive characters , the passage from one stage of difference to another , may be safely attributed to the cumulative action of natural selection , hereafter to be explained , and to the effects of the ...
Page 68
... respects , it will then be dominant within its own class . Species of the Larger Genera in each Country vary more frequently than the Species of the Smaller Genera . If the plants inhabiting a country , as described in any Flora , be ...
... respects , it will then be dominant within its own class . Species of the Larger Genera in each Country vary more frequently than the Species of the Smaller Genera . If the plants inhabiting a country , as described in any Flora , be ...
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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