The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJohn Murray, 1873 - Всего страниц: 458 |
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Стр. 10
... look at the inheritance of every character whatever as the rule , and non - inheritance as the anomaly . The laws governing inheritance are for the most part unknown . No one can say why the same peculiarity in different individuals of ...
... look at the inheritance of every character whatever as the rule , and non - inheritance as the anomaly . The laws governing inheritance are for the most part unknown . No one can say why the same peculiarity in different individuals of ...
Стр. 12
... look to the hereditary varieties or races of our domestic animals and plants , and compare them with closely allied species , we generally perceive in each domestic race , as already remarked , less uniformity of character than in true ...
... look to the hereditary varieties or races of our domestic animals and plants , and compare them with closely allied species , we generally perceive in each domestic race , as already remarked , less uniformity of character than in true ...
Стр. 18
... look in vain through the whole great family of Columbidæ for a beak like that of the English carrier , or that of the short - faced tumbler , or barb ; for reversed feathers like those of the Jacobin ; for a crop like that of the pouter ...
... look in vain through the whole great family of Columbidæ for a beak like that of the English carrier , or that of the short - faced tumbler , or barb ; for reversed feathers like those of the Jacobin ; for a crop like that of the pouter ...
Стр. 22
... look further than to mere variability . We cannot suppose that all the breeds were suddenly produced as perfect and as useful as we now see them ; indeed , in many cases , we know that this has not been their history . The key is man's ...
... look further than to mere variability . We cannot suppose that all the breeds were suddenly produced as perfect and as useful as we now see them ; indeed , in many cases , we know that this has not been their history . The key is man's ...
Стр. 40
... Look at the common oak , how closely it has been studied ; yet a German author makes more than a dozen species out of forms , which are almost universally considered by other botanists to be varieties ; and in this country the highest ...
... Look at the common oak , how closely it has been studied ; yet a German author makes more than a dozen species out of forms , which are almost universally considered by other botanists to be varieties ; and in this country the highest ...
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On the Origin of Species by Means of Natural Selection: Or The ..., Том 2 Charles Darwin Полный просмотр - 1888 |
Часто встречающиеся слова и выражения
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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Стр. 1 - 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.
Стр. 162 - ... 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
Стр. 1 - ... 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...
Стр. 424 - 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.
Стр. 50 - In these several senses, which pass into each other, I use for convenience' sake the general term of Struggle for Existence.
Стр. 322 - Every species has come into existence coincident both in space and time with a pre-existing closely allied species.
Стр. 146 - 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.
Стр. 310 - 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...
Стр. 57 - Now the number of. mice is largely dependent, as every one knows, on the number of cats; and Col.
Стр. 103 - 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...