The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJohn Murray, 1873 - 458페이지 |
도서 본문에서
51개의 결과 중 1 - 5개
v 페이지
... climate Protection from the number of individuals Complex relations of all animals and plants throughout nature Struggle for life most severe between individuals and varieties of the same species : often severe between species of the ...
... climate Protection from the number of individuals Complex relations of all animals and plants throughout nature Struggle for life most severe between individuals and varieties of the same species : often severe between species of the ...
viii 페이지
... climate and of the level of the land , and by occasional means --Dispersal during the Glacial period Alternate Glacial periods in the north and south -- 316-342 islands - CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - continued ...
... climate and of the level of the land , and by occasional means --Dispersal during the Glacial period Alternate Glacial periods in the north and south -- 316-342 islands - CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - continued ...
xv 페이지
... climate , this would at length 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 ...
... climate , this would at length 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 ...
2 페이지
... climate , food , & c . , as the only possible cause of variation . In one limited sense , as we shall hereafter see , this may be true ; but it is preposterous to attribute to mere external conditions , the structure , for instance , of ...
... climate , food , & c . , as the only possible cause of variation . In one limited sense , as we shall hereafter see , this may be true ; but it is preposterous to attribute to mere external conditions , the structure , for instance , of ...
5 페이지
... climates and treat- ment , we are driven to conclude that this great variability is due to our domestic productions having been raised under conditions of life not so uniform as , and somewhat different from , those to which the parent ...
... climates and treat- ment , we are driven to conclude that this great variability is due to our domestic productions having been raised under conditions of life not so uniform as , and somewhat different from , those to which the parent ...
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
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
인기 인용구
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...