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 viii
... formations - On the absence of intermediate varieties in any one formation — On the sudden appearance of groups of species — On their sudden appearance in the lowest known fossiliferous strata .. -- - Page 302-337 CHAPTER X. ON THE ...
... formations - On the absence of intermediate varieties in any one formation — On the sudden appearance of groups of species — On their sudden appearance in the lowest known fossiliferous strata .. -- - Page 302-337 CHAPTER X. ON THE ...
Page xii
... formations which must once have covered granitic areas . On the slight modifications which the latest tertiary forms have apparently undergone . On the nature of the links between past and present species , which geology has , and has ...
... formations which must once have covered granitic areas . On the slight modifications which the latest tertiary forms have apparently undergone . On the nature of the links between past and present species , which geology has , and has ...
Page 10
... formation ; so that , in fact , " sports " support the view , that variability may be largely attri- buted to the ovules or pollen , or to both , having been affected by the treatment of the parent prior to the act of conception . These ...
... formation ; so that , in fact , " sports " support the view , that variability may be largely attri- buted to the ovules or pollen , or to both , having been affected by the treatment of the parent prior to the act of conception . These ...
Page 42
... preventing crosses is an important element of success in the formation of new races , -- at least , in a country In this re- which is already stocked with other races 42 CIRCUMSTANCES FAVOURABLE TO SELECTION . CHAP . I.
... preventing crosses is an important element of success in the formation of new races , -- at least , in a country In this re- which is already stocked with other races 42 CIRCUMSTANCES FAVOURABLE TO SELECTION . CHAP . I.
Page 43
... formation of new breeds . Pigeons , I may add , can be propagated in great numbers and at a very quick rate , and inferior birds may be freely rejected , as when killed they serve for food . On the other hand , cats , from their ...
... formation of new breeds . Pigeons , I may add , can be propagated in great numbers and at a very quick rate , and inferior birds may be freely rejected , as when killed they serve for food . On the other hand , cats , from their ...
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Common terms and phrases
accumulated adapted affinities allied species America amount analogous ancient animals appear Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo 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 hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living male mammals manner Marsupials migration modification modified descendants mongrels natural selection naturalists nearly nest occasionally offspring organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor racter ranked reciprocal crosses remarked resemble rudimentary organs seeds Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely