The Origin of Species by means of Natural Selection, 6th Edition, Charles Darwin
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Ücretsiz
Charles Darwin

The Origin of Species by means of Natural Selection, 6th Edition

Oku
Olga Serova
Olga Serovaalıntı yaptı5 yıl önce
Struggle for life most severe between individuals and varieties of the same species; often severe between species of the same genus. The relation of organism to organism the most important of all relations.
b6757920145
b6757920145alıntı yaptı3 ay önce
Of the accidental varieties of man, which would occur among the first few and scattered inhabitants of the middle regions of Africa, some one would be better fitted than others to bear the diseases of the country. This race would consequently multiply, while the others would decrease; not only from their in ability to sustain the attacks of disease, but from their incapacity of contending with their more vigorous neighbours. The colour of this vigorous race I take for granted, from what has been already said, would be dark. But the same disposition to form varieties still existing, a darker and a darker race would in the course of time occur: and as the darkest would be the best fitted for the 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 Mr. Rowley, of the United States, for having called my attention, through Mr. Brace, to the above passage of Dr. Wells' work.
Vlad
Vladalıntı yaptı2 yıl önce
nature gives successive variations; man adds them up in certain directions useful to him. In this sense he may be said to have made for himself useful breeds.
eadyidih
eadyidihalıntı yaptı3 yıl önce
nature of the organism and the nature of the conditions
Anzi Matta
Anzi Mattaalıntı yaptı4 yıl önce
And if we reflect on the vast diversity of the plants and animals which have been cultivated, and which have varied during all ages under the most different climates and treatment, 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 species had been exposed under nature
Anzi Matta
Anzi Mattaalıntı yaptı4 yıl önce
And if we reflect on the vast diversity of the plants and animals which have been cultivated, and which have varied during all ages under the most different climates and treatment, 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 species had been exposed under nature. There
Anzi Matta
Anzi Mattaalıntı yaptı4 yıl önce
diversity of the plants and animals which have been cultivated, and which have varied during all ages under the most different climates and treatment, 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 species had been exposed under nature
Anwar dani
Anwar danialıntı yaptı4 yıl önce
As far as I am able to judge, after long attending to the subject
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