The origin of species by means of natural selectionРипол Классик, 1929 - 454페이지 |
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84개의 결과 중 1 - 5개
1 페이지
... period to the present day l have steadily pursued the same object. I hope that I may be excused for entering on these personal details, as I give them to show that l have not been hasty in coming to a decision. My work is now nearly ...
... period to the present day l have steadily pursued the same object. I hope that I may be excused for entering on these personal details, as I give them to show that l have not been hasty in coming to a decision. My work is now nearly ...
8 페이지
... period of life the causes of variability, w atever the may be, generally act; whether during the early or ate eriod of development of the embryo, or at the instant 0F conception. Geofi'roy St. Hilaire's experiments show that unnatural ...
... period of life the causes of variability, w atever the may be, generally act; whether during the early or ate eriod of development of the embryo, or at the instant 0F conception. Geofi'roy St. Hilaire's experiments show that unnatural ...
10 페이지
... period of flowering with plants when transported from one climate to another. In animals it has a more marked effect ; for instance, I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more, in ...
... period of flowering with plants when transported from one climate to another. In animals it has a more marked effect ; for instance, I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more, in ...
21 페이지
... period at which the perfect plumage is acquired varies, as does the state of the Own with which the nestling birds are clothed when hatched. The shape and size of the eggs vary. The manner of flight difl'ers remarkably; as does in some ...
... period at which the perfect plumage is acquired varies, as does the state of the Own with which the nestling birds are clothed when hatched. The shape and size of the eggs vary. The manner of flight difl'ers remarkably; as does in some ...
60 페이지
... period of less than ten years. Several of the plants, such as the cardoon and a tall thistle, now most numerous over the wide lains of La Plata, clothing square leagues of surface a most to the exclusion of all other plants, have been ...
... period of less than ten years. Several of the plants, such as the cardoon and a tall thistle, now most numerous over the wide lains of La Plata, clothing square leagues of surface a most to the exclusion of all other plants, have been ...
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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자주 나오는 단어 및 구문
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