58개의 결과 중 1 - 5개
... cumstances favourable and unfavourable to Natural Selection, namely,
intercrossing, isolation, number of individuals— Slow action-- Extinction caused
by Natural Selection — Divergence of Character, related to the diversity of
inhabitants of ...
Distribution of fresh- water [productions— On tho inhabitants of oceanic islands—
Absence of Batrachlans and of terrestrial mammals — On tho relation of tho
inhabitants of islands to those of the nearest mainland — On colonisation from
INTRODUCTION. When on board H. M. S. 1 Beagle ' as naturalist, I was much
struck with certain facts in the distribution of the inhabitants of South America, and
in the geological relations of the present to the past inhabitants of that continent.
Yet these relations are of the highest importance, for they determine the present
welfare, and, as I believe, the future success and modification of every inhabitant
of this world. Still less do we know of the mutual relations of the innumerable ...
... of unconscious selection will always tend, — perhaps more at one period than
at another, as the breed rises or falls in fashion, — perhaps more in one district
than in another, according to the state of civilisation of the inhabitants, — slowly
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