On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1860 - 502ÆäÀÌÁö "In considering the Origin of Species, it is quite conceivable that a naturalist, reflecting on the mutual affinities of organic beings, on their embryological relations, their geographical distribution, geological succession, and other such facts, might come to the conclusion that each species had not been independently created, but had descended, like varieties, from other species. Nevertheless, such a conclusion, even if well founded, would be unsatisfactory, until it could be shown how the innumerable species inhabiting this world have been modified, so as to acquire that perfection of structure and coadaptation which most justly excites our admiration. Naturalists continually refer to external conditions, such as climate, food, & c, as the only possible cause of variation. In one very limited sense, as we shall hereafter see, this may be true; but it is preposterous to attribute to mere external conditions, the structure, for instance, of the woodpecker, with its feet, tail, beak, and tongue, so admirably adapted to catch insects under the bark of trees. In the case of the misseltoe, which draws its nourishment from certain trees, which has seeds that must be transported by certain birds, and which has flowers with separate sexes absolutely requiring the agency of certain insects to bring pollen from one flower to the other, it is equally preposterous to account for the structure of this parasite, with its relations to several distinct organic beings, by the effects of external conditions, or of habit, or of the volition of the plant itself"--Introduction. (PsycINFO Database Record (c) 2012 APA, all rights reserved) |
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3 ÆäÀÌÁö
... adapted to catch insects under the bark of trees . In the case of the misseltoe , which draws its nourishment from certain trees , which has seeds that must be transported by certain birds , and which has flowers with separate sexes ...
... adapted to catch insects under the bark of trees . In the case of the misseltoe , which draws its nourishment from certain trees , which has seeds that must be transported by certain birds , and which has flowers with separate sexes ...
61 ÆäÀÌÁö
... adapt organic beings to his own uses , through the accumulation of slight but useful variations , given to him by the hand of Nature . But Natural Selection , as we shall hereafter see , is a power incessantly ready for action , and is ...
... adapt organic beings to his own uses , through the accumulation of slight but useful variations , given to him by the hand of Nature . But Natural Selection , as we shall hereafter see , is a power incessantly ready for action , and is ...
77 ÆäÀÌÁö
... adapted for diving , allows it to compete with other aquatic insects , to hunt for its own prey , and to escape serving as prey to other animals . The store of nutriment laid up within the seeds of many plants seems at first sight to ...
... adapted for diving , allows it to compete with other aquatic insects , to hunt for its own prey , and to escape serving as prey to other animals . The store of nutriment laid up within the seeds of many plants seems at first sight to ...
81 ÆäÀÌÁö
... adapted forms could not freely enter , we should then have places in the economy of nature which would assuredly be better filled up , if some of the ori- ginal inhabitants were in some manner modified ; for , had the area been open to ...
... adapted forms could not freely enter , we should then have places in the economy of nature which would assuredly be better filled up , if some of the ori- ginal inhabitants were in some manner modified ; for , had the area been open to ...
82 ÆäÀÌÁö
... adapting them to their altered conditions , would tend to be pre- served ; and natural selection would thus have free ... adapted to each other and to the physical conditions under which they live , that none of them could anyhow be ...
... adapting them to their altered conditions , would tend to be pre- served ; and natural selection would thus have free ... adapted to each other and to the physical conditions under which they live , that none of them could anyhow be ...
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adapted affinities allied species America analogous ancient animals become bees believe birds breeds cause cells chapter characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable Fcap fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period greater number groups of species habits Hence hermaphrodites History hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larv©¡ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring perfect pigeons plants pollen Portrait Post 8vo present principle probably produced progenitor racter ranked reciprocal crosses remarked resemble rudimentary organs Second Edition seeds sexual selection Silurian slight South America sterility structure struggle successive supposed theory Third Edition tion variability variations varieties vary Vols widely Woodcuts