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 21
... common cattle , may , indeed , be looked upon as established by the admirable researches of Professor Rütimeyer . With respect to horses , from reasons which I cannot here give , I am doubtfully inclined to believe , in opposition to ...
... common cattle , may , indeed , be looked upon as established by the admirable researches of Professor Rütimeyer . With respect to horses , from reasons which I cannot here give , I am doubtfully inclined to believe , in opposition to ...
Página 22
... common wild duck and rabbit . The doctrine of the origin of our several domestic races from several aboriginal stocks , has been carried to an absurd extreme by some authors . They believe that every race which breeds true , let the ...
... common wild duck and rabbit . The doctrine of the origin of our several domestic races from several aboriginal stocks , has been carried to an absurd extreme by some authors . They believe that every race which breeds true , let the ...
Página 24
... common tumbler has the singular inherited habit of flying at a great height in a compact flock , and tumbling in the air head over heels . The runt is a bird of great size , with long massive beak and large feet ; some of the sub ...
... common tumbler has the singular inherited habit of flying at a great height in a compact flock , and tumbling in the air head over heels . The runt is a bird of great size , with long massive beak and large feet ; some of the sub ...
Página 26
... common opinion of naturalists is correct , namely , that all are descended from the rock - pigeon ( Columba livia ) , in- cluding under this term several geographical races or sub - species , which differ from each other in the most ...
... common opinion of naturalists is correct , namely , that all are descended from the rock - pigeon ( Columba livia ) , in- cluding under this term several geographical races or sub - species , which differ from each other in the most ...
Página 27
... common rock - pigeon , which has the same habits with the domestic breeds , has not been exterminated even on several of the smaller British islets , or on the shores of the Mediterranean . Hence the supposed extermination of so many ...
... common rock - pigeon , which has the same habits with the domestic breeds , has not been exterminated even on several of the smaller British islets , or on the shores of the Mediterranean . Hence the supposed extermination of so many ...
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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