The origin of species by means of natural selectionРипол Классик, 1929 - 454페이지 |
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89개의 결과 중 1 - 5개
12 페이지
... character whatever as the rule, and non-inheritance as the anomaly. The laws governing inheritance are quite unknown ... characters to its grandfather or grandmother or other more remote ancestor; why a peculiarity is ofien transmitted ...
... character whatever as the rule, and non-inheritance as the anomaly. The laws governing inheritance are quite unknown ... characters to its grandfather or grandmother or other more remote ancestor; why a peculiarity is ofien transmitted ...
14 페이지
... characters to ancestral forms, it seems to me not improbable, that if we could succeed in naturalising, or were to cultivate, during man generations, the several races, for instance, of the cab e, in very poor soil (in which case ...
... characters to ancestral forms, it seems to me not improbable, that if we could succeed in naturalising, or were to cultivate, during man generations, the several races, for instance, of the cab e, in very poor soil (in which case ...
15 페이지
... character than in true species. Domestic races of the same species, also, ofien have a somewhat monstrous character ... characters are of generic value; all such valuations being at present empirical. Moreover, on the view of the origin ...
... character than in true species. Domestic races of the same species, also, ofien have a somewhat monstrous character ... characters are of generic value; all such valuations being at present empirical. Moreover, on the view of the origin ...
18 페이지
... characters be ever so sli ht, has had its wild prototype. At this rate there must ve existed at leat a score of species of wild cattle, as many sheep, and several goats in Europe alone, and several even within Great Britain. One author ...
... characters be ever so sli ht, has had its wild prototype. At this rate there must ve existed at leat a score of species of wild cattle, as many sheep, and several goats in Europe alone, and several even within Great Britain. One author ...
22 페이지
... characters of the domestic breeds. Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated, and yet be unknown to ornithologists; and this, considering their size, habits ...
... characters of the domestic breeds. Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated, and yet be unknown to ornithologists; and this, considering their size, habits ...
목차
5 | |
ON was GEOLOGICAL SUCCESSION OF ORGANIC | 155 |
GEOGRAPHICAL DISTRIBUTION | 282 |
Gnoonnmcu DISTRIBUTION Continued | 302 |
RECAPITULATION AND CONCLUSION | 415 |
41 | 449 |
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action adapted advantage allied America amount ancient animals appear become believe birds breeds cause characters climate closely common considered continuous crossed descendants difl'erent distinct domestic doubt evidence existing extinct extremely facts families favourable fertility find first flowers follow formations forms genera genus give given greater groups habits hand Hence hybrids important increase individuals inhabitants inherited insects instance instincts intermediate islands kind known land laws less lines living look males manner means migration modification namely natural selection naturalists nearly never observed occur organic origin parent perfect period plants points present principle probably produced range ranked reason regions remains remarked resemble seeds seems seen separated shown single slight sometimes species sterility structure struggle successive suppose tend theory tion trees variability variations varieties vary whole widely