The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJohn Murray, 1873 - 458페이지 |
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82개의 결과 중 1 - 5개
xi 페이지
... become somewhat stronger or weaker . The more important corrections and some additions in the pre- sent volume are tabulated on the following page , for the convenience of those interested in the subject , and who possess the fifth ...
... become somewhat stronger or weaker . The more important corrections and some additions in the pre- sent volume are tabulated on the following page , for the convenience of those interested in the subject , and who possess the fifth ...
xv 페이지
... become the most prevalent , if not the only race , in the particular country in which it had originated . " He then extends these same views to the white inhabitants of colder climates . I am indebted to Mr. Rowley , of the United ...
... become the most prevalent , if not the only race , in the particular country in which it had originated . " He then extends these same views to the white inhabitants of colder climates . I am indebted to Mr. Rowley , of the United ...
xvi 페이지
... become improved in the course of modification . This same view was given in his 55th Lecture , published in the ' Lancet ' in 1834 . In 1831 Mr. Patrick Matthew published his work on ' Naval Timber and Arboriculture , ' in which he ...
... become improved in the course of modification . This same view was given in his 55th Lecture , published in the ' Lancet ' in 1834 . In 1831 Mr. Patrick Matthew published his work on ' Naval Timber and Arboriculture , ' in which he ...
xvii 페이지
... become adapted to its peculiar habits of life . The work , from its powerful and brilliant style , though displaying ... becoming of living things . " Farther on ( p . xc . ) , after referring to geographical distri- bution , he adds ...
... become adapted to its peculiar habits of life . The work , from its powerful and brilliant style , though displaying ... becoming of living things . " Farther on ( p . xc . ) , after referring to geographical distri- bution , he adds ...
17 페이지
... become extinct in the wild state . But birds breeding on precipices , and good fliers , are unlikely to be exterminated ; and the common rock- pigeon , which has the same habits with the domestic breeds , has not been exterminated even ...
... become extinct in the wild state . But birds breeding on precipices , and good fliers , are unlikely to be exterminated ; and the common rock- pigeon , which has the same habits with the domestic breeds , has not been exterminated even ...
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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 lamellæ larvæ 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 페이지 - 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 페이지 - ... 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 페이지 - ... 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 페이지 - 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 페이지 - In these several senses, which pass into each other, I use for convenience' sake the general term of Struggle for Existence.
322 페이지 - Every species has come into existence coincident both in space and time with a pre-existing closely allied species.
146 페이지 - 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 페이지 - 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 페이지 - Now the number of. mice is largely dependent, as every one knows, on the number of cats; and Col.
103 페이지 - 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...