On the Origin of Species by Means of Natural Selection: Or The Preservation of Favoured Races in the Struggle for LifeHumphrey Milford, Oxford University Press, 1923 - 454ÆäÀÌÁö |
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... America , and in the geological relations of the present to the past inhabitants of that continent . These facts seemed to me to throw some light on the origin of species - that mystery of mysteries , as it has been called by one of our ...
... America , and in the geological relations of the present to the past inhabitants of that continent . These facts seemed to me to throw some light on the origin of species - that mystery of mysteries , as it has been called by one of our ...
62 ÆäÀÌÁö
... America . Here I will make only a few remarks , just to recall to the reader's mind some of the chief points . Eggs or very young animals seem generally to suffer most , but this is not invariably the case . With plants there is a vast ...
... America . Here I will make only a few remarks , just to recall to the reader's mind some of the chief points . Eggs or very young animals seem generally to suffer most , but this is not invariably the case . With plants there is a vast ...
67 ÆäÀÌÁö
... America ) the vegetation : this again would largely affect the insects ; and this , as we just have seen in Staffordshire , the insectivorous birds , and so onwards in ever - increasing circles of complexity . We began this series by ...
... America ) the vegetation : this again would largely affect the insects ; and this , as we just have seen in Staffordshire , the insectivorous birds , and so onwards in ever - increasing circles of complexity . We began this series by ...
124 ÆäÀÌÁö
... America , a burrowing rodent , the tuco - tuco , or Ctenomys , is even more subterranean in its habits than the mole ; and I was assured by a Spaniard , who had often caught them , that they were frequently blind ; one which I kept ...
... America , a burrowing rodent , the tuco - tuco , or Ctenomys , is even more subterranean in its habits than the mole ; and I was assured by a Spaniard , who had often caught them , that they were frequently blind ; one which I kept ...
125 ÆäÀÌÁö
... America and Europe . On my view we must suppose that American animals , having ordinary powers of vision , slowly migrated by successive generations from the outer world into the deeper and deeper recesses of the Kentucky caves , as did ...
... America and Europe . On my view we must suppose that American animals , having ordinary powers of vision , slowly migrated by successive generations from the outer world into the deeper and deeper recesses of the Kentucky caves , as did ...
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accumulated adapted affinities allied species America amount analogous ancient appear Archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence doubt embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing land larv©¡ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation vary whole widely