The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, 1권D. Appleton, 1898 |
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... genera - Many of the species of the larger genera resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges . 51 CHAPTER III . STRUGGLE FOR EXISTENCE . Its bearing on. V.
... genera - Many of the species of the larger genera resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges . 51 CHAPTER III . STRUGGLE FOR EXISTENCE . Its bearing on. V.
18 페이지
... closely allied species , we generally perceive in each domestic race , as already remarked , less uniformity of character than in true species . Domestic races often have a somewhat monstrous character ; by which I mean , that ...
... closely allied species , we generally perceive in each domestic race , as already remarked , less uniformity of character than in true species . Domestic races often have a somewhat monstrous character ; by which I mean , that ...
19 페이지
... closely allied natural species - for instance , of the many foxes - inhabiting different quarters of the world . I do not believe , as we shall presently see , that the whole amount of difference between the several breeds of the dog ...
... closely allied natural species - for instance , of the many foxes - inhabiting different quarters of the world . I do not believe , as we shall presently see , that the whole amount of difference between the several breeds of the dog ...
20 페이지
... closely resemble , or are even identical with , those still existing . But this only throws far backwards the history of civilisation , and shows that animals were domesticated at a much earlier period than has hitherto been supposed ...
... closely resemble , or are even identical with , those still existing . But this only throws far backwards the history of civilisation , and shows that animals were domesticated at a much earlier period than has hitherto been supposed ...
22 페이지
... closely resembling the Italian greyhound , the bloodhound , the bull - dog , pug - dog , or Blenheim spaniel , & c . - so unlike all wild Candia - ever existed in a state of nature ? It has often been loosely said that all our races of.
... closely resembling the Italian greyhound , the bloodhound , the bull - dog , pug - dog , or Blenheim spaniel , & c . - so unlike all wild Candia - ever existed in a state of nature ? It has often been loosely said that all our races of.
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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