On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1860 - 502페이지 This is the 'second edition' of Darwin's Origin of Species. |
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6 페이지
... believe , the future success and modification of every inhabitant of this world . Still less do we know of the mutual relations of the innumerable inhabitants of the world during the many past geological epochs in its history . Although ...
... believe , the future success and modification of every inhabitant of this world . Still less do we know of the mutual relations of the innumerable inhabitants of the world during the many past geological epochs in its history . Although ...
14 페이지
... believe that the rule has a wider extension , and that when there is no apparent reason why a peculiarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first ...
... believe that the rule has a wider extension , and that when there is no apparent reason why a peculiarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first ...
17 페이지
... believe , as we shall presently see , that the whole amount of difference between the several breeds of the dog has been produced under domestication ; I believe that some small part of the difference is due to their being descended ...
... believe , as we shall presently see , that the whole amount of difference between the several breeds of the dog has been produced under domestication ; I believe that some small part of the difference is due to their being descended ...
18 페이지
... believe that these latter have had more than one wild parent . With respect to horses , from reasons which I cannot give here , I am doubtfully inclined to believe , in opposition to several authors , that all the races have descended ...
... believe that these latter have had more than one wild parent . With respect to horses , from reasons which I cannot give here , I am doubtfully inclined to believe , in opposition to several authors , that all the races have descended ...
19 페이지
... believe that every race which breeds true , let the distinctive cha- racters be ever so slight , has had its wild prototype . At this rate there must have existed at least a score of species of wild cattle , as many sheep , and several ...
... believe that every race which breeds true , let the distinctive cha- racters be ever so slight , has had its wild prototype . At this rate there must have existed at least a score of species of wild cattle , as many sheep , and several ...
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accumulated adapted affinities allied species America amount analogous ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable Fcap fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons plants pollen present probably produced progenitor racters ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely