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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5 ÆäÀÌÁö
... whole animal and vegetable kingdoms . As many more individuals of each species are born than can possibly survive ; and as , conse- quently , there is a frequently recurring struggle for existence , it follows that any being , if it ...
... whole animal and vegetable kingdoms . As many more individuals of each species are born than can possibly survive ; and as , conse- quently , there is a frequently recurring struggle for existence , it follows that any being , if it ...
11 ÆäÀÌÁö
... whole skeleton , than do the same bones in the wild - duck ; and I presume that this change may be safely attributed to the domestic duck flying much less , and walking more , than its wild parent . The great and inherited development ...
... whole skeleton , than do the same bones in the wild - duck ; and I presume that this change may be safely attributed to the domestic duck flying much less , and walking more , than its wild parent . The great and inherited development ...
12 ÆäÀÌÁö
... whole organisation seems to have become plastic , and tends to depart in some small degree from that of the parental type . Any variation which is not inherited is unimportant for us . But the number and diversity of inheritable ...
... whole organisation seems to have become plastic , and tends to depart in some small degree from that of the parental type . Any variation which is not inherited is unimportant for us . But the number and diversity of inheritable ...
13 ÆäÀÌÁö
... whole subject , would be , to look at the in- heritance of every character whatever as the rule , and non - inheritance as the anomaly . The laws governing inheritance are quite unknown ; no one can say why a peculiarity in different ...
... whole subject , would be , to look at the in- heritance of every character whatever as the rule , and non - inheritance as the anomaly . The laws governing inheritance are quite unknown ; no one can say why a peculiarity in different ...
18 ÆäÀÌÁö
... whole subject must , I think , remain vague ; nevertheless , I may , without here entering on any details , state that , from geographical and other con- siderations , I think it highly probable that our domestic dogs have descended ...
... whole subject must , I think , remain vague ; nevertheless , I may , without here entering on any details , state that , from geographical and other con- siderations , I think it highly probable that our domestic dogs have descended ...
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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