On the Origin of Species by Means of Natural Selection, Or, The Preservation of Favoured Races in the Struggle for Life |
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Page 93
... Hence , more new places will be formed , and the competition to fill them will be more severe on a large than on a small and isolated area . Moreover , great areas , though now con- tinuous , owing to oscillations of level , will often ...
... Hence , more new places will be formed , and the competition to fill them will be more severe on a large than on a small and isolated area . Moreover , great areas , though now con- tinuous , owing to oscillations of level , will often ...
Page 189
... Hence I will give the observations which I have myself made , in some little detail . I opened fourteen nests of F. sanguinea , and found a few slaves in all . Males and fertile females of the slave - species are found only in their own ...
... Hence I will give the observations which I have myself made , in some little detail . I opened fourteen nests of F. sanguinea , and found a few slaves in all . Males and fertile females of the slave - species are found only in their own ...
Page 377
... Hence , I conclude , that it is quite possible that each of the many successive modifications by which each species has acquired its present structure may have supervened at a not very early period of life ; and some direct evidence ...
... Hence , I conclude , that it is quite possible that each of the many successive modifications by which each species has acquired its present structure may have supervened at a not very early period of life ; and some direct evidence ...
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Common terms and phrases
accumulated adapted affinities allied species amount analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distant distinct species divergence domestic doubt eggs embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flower formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important increase in number individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring perfect pigeons pistil plants pollen present probably produced progenitor ranked reciprocal crosses remarked resemblance seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder theory tion trees variability variations vary whole widely