78개의 결과 중 1 - 5개
To this latter agency he seems to attribute all the beautiful adaptations in nature,
— such as the long neck of the giraffe for browsing on the branches of trees.* But
he likewise believed in a law of progressive development ; and as all the forms ...
... and sadly damaged by some of its supporters, is yet the only one to which
physiology lends any countenance — their existence would seem to show that
the amount of modification which living beings have undergone during
geological time ...
ear, from the animals not being much alarmed by danger, seems probable. There
are many laws regulating variation, some few of which can be dimly seen, and
will be hereafter briefly mentioned. I will here only allude to what may be called ...
Nevertheless, as our varieties certainly do occasionally revert in some of their
characters to ancestral forms, it seems to me not improbable, that if we could
succeed in naturalising, or were to cultivate, during many generations, the
Knowing, as we do, that savages are very fond of taming animals, it Seems to me
unlikely, in the case of the dog-genus, which is distributed in a wild state
throughout the world, that since man first appeared one single species alone
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