The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJohn Murray, 1873 - 458ÆäÀÌÁö |
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7 ÆäÀÌÁö
... male and female unite . How many animals there are which will not breed , though kept in an almost free state in their native country ! This is generally , but erroneously , attributed to vitiated instincts . Many cultivated plants ...
... male and female unite . How many animals there are which will not breed , though kept in an almost free state in their native country ! This is generally , but erroneously , attributed to vitiated instincts . Many cultivated plants ...
9 ÆäÀÌÁö
... males . Colour and constitutional peculiarities go together , of which many remarkable cases could be given amongst animals and plants . From facts collected by Heusinger , it appears that white sheep and pigs are injured by certain ...
... males . Colour and constitutional peculiarities go together , of which many remarkable cases could be given amongst animals and plants . From facts collected by Heusinger , it appears that white sheep and pigs are injured by certain ...
10 ÆäÀÌÁö
... males of our domestic breeds are often transmitted , either exclusively or in a much greater degree , to the males alone . A much more important rule , which I think may be trusted , is that , at whatever period of life a peculiarity ...
... males of our domestic breeds are often transmitted , either exclusively or in a much greater degree , to the males alone . A much more important rule , which I think may be trusted , is that , at whatever period of life a peculiarity ...
11 ÆäÀÌÁö
... male element ; in nearly the same manner as the increased length of the horns in the offspring from a short - horned cow by a long - horned bull , though appearing late in life , is clearly due to the male element . Having alluded to ...
... male element ; in nearly the same manner as the increased length of the horns in the offspring from a short - horned cow by a long - horned bull , though appearing late in life , is clearly due to the male element . Having alluded to ...
15 ÆäÀÌÁö
... male bird , is also remarkable from the wonderful development of the carunculated skin about the head ; and this is accompanied by greatly elongated eyelids , very large external orifices to the nostrils , and a wide gape of mouth . The ...
... male bird , is also remarkable from the wonderful development of the carunculated skin about the head ; and this is accompanied by greatly elongated eyelids , very large external orifices to the nostrils , and a wide gape of mouth . The ...
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adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continuous crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formations formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamell©¡ larv©¡ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed theory tion variability variations varieties vary whilst whole wings young
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1 ÆäÀÌÁö - These facts, as will be seen in the latter chapters of this volume, seemed to throw some light on the origin of species — that mystery of mysteries, as it has been called by one of our greatest philosophers.
162 ÆäÀÌÁö - ... if it could be proved that any part of the structure of any one species had been formed for the exclusive good of another species, it would annihilate my theory, for such could not have been produced through natural selection
1 ÆäÀÌÁö - ... of our greatest philosophers. On my return home, it occurred to me, in 1837, that something might perhaps be made out on this question by patiently accumulating and reflecting on all sorts of facts which could possibly have any bearing on it. After five years' work I allowed myself to speculate on the subject, and drew up some short notes...
424 ÆäÀÌÁö - Analogy would lead me one step further, namely, to the belief that all animals and plants have descended from some one prototype. But analogy may be a deceitful guide.
50 ÆäÀÌÁö - In these several senses, which pass into each other, I use for convenience' sake the general term of Struggle for Existence.
322 ÆäÀÌÁö - Every species has come into existence coincident both in space and time with a pre-existing closely allied species.
146 ÆäÀÌÁö - If it could be demonstrated that any complex organ existed which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down.
310 ÆäÀÌÁö - I strongly insisted, in 1839 and 1845, on this " law of the succession of types,"—on " this wonderful relationship in the same continent between the dead and the living." Professor Owen has subsequently extended the same generalisation to the mammals of the Old World. We see the same law in this author's restorations of the extinct and gigantic birds of New Zealand. We see it also in the birds of the caves of Brazil. Mr. Woodward has shown that the same law holds good with sea-shells, but, from...
57 ÆäÀÌÁö - Now the number of. mice is largely dependent, as every one knows, on the number of cats; and Col.
103 ÆäÀÌÁö - It is a truly wonderful fact—the wonder of which we are apt to overlook from familiarity—that all animals and all plants throughout all time and space should be related to each other in groups subordinate to groups, in the manner which we everywhere behold...