The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life: Reprinted from the Sixth London Edition, with All Additions and CorrectionsA. L. Burt Company, 1890 - 538페이지 |
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249 페이지
... young of the wild rabbit ; scarcely any animal is tamer than the young of the tame rabbit ; but I can hardly suppose that domestic rabbits have often been selected for tameness alone ; so that we must attribute at least the greater part ...
... young of the wild rabbit ; scarcely any animal is tamer than the young of the tame rabbit ; but I can hardly suppose that domestic rabbits have often been selected for tameness alone ; so that we must attribute at least the greater part ...
251 페이지
... young cuckoo , together with a young jay in the nest of a blue jay ( Gar- rulus cristatus ) ; and as both were nearly full feathered , there could be no mistake in their identification . I could also give several instances of various ...
... young cuckoo , together with a young jay in the nest of a blue jay ( Gar- rulus cristatus ) ; and as both were nearly full feathered , there could be no mistake in their identification . I could also give several instances of various ...
253 페이지
... young cuckoo which was actually seen , while still blind and not able even to hold up its own head , in the act of ejecting its foster- brothers . One of these was replaced in the nest by the observer , and was again thrown out . With ...
... young cuckoo which was actually seen , while still blind and not able even to hold up its own head , in the act of ejecting its foster- brothers . One of these was replaced in the nest by the observer , and was again thrown out . With ...
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adapted admit affinities ALEXANDRE DUMAS allied species America ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied color continued crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favorable females fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate intervals kind lamellæ larvæ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest oceanic islands offspring organs paleozoic parent peculiar perfect pigeons pistil pollen present principle probably produced quadrupeds ranked remarked resemblance rudimentary seeds Silurian SIR WALTER SCOTT slight South America stamens sterility structure successive suppose tend theory tion trees variability variations varieties vary whole widely different wings young