The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life, Volume 1 |
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Page 30
... observations , purposely made , on the most distinct breeds . Now , hardly any cases have been ascertained with certainty of hybrids from two quite distinct species of animals being perfectly fertile . Some authors believe that long ...
... observations , purposely made , on the most distinct breeds . Now , hardly any cases have been ascertained with certainty of hybrids from two quite distinct species of animals being perfectly fertile . Some authors believe that long ...
Page 38
... observation , perhaps never , the case . The law of correlated variation , the importance of which should never be overlooked , will ensure some differences ; but , as a general rule , it cannot be doubted that the continued selection ...
... observation , perhaps never , the case . The law of correlated variation , the importance of which should never be overlooked , will ensure some differences ; but , as a general rule , it cannot be doubted that the continued selection ...
Page 53
... observed in the individuals of the same species inhabiting the same confined locality , may be called individual differences . No one supposes that all the individuals of the same species are cast in the same actual mould . These ...
... observed in the individuals of the same species inhabiting the same confined locality , may be called individual differences . No one supposes that all the individuals of the same species are cast in the same actual mould . These ...
Page 56
... observed , with some dimorphic plants . It certainly at first appears a highly remarkable fact that the same female butterfly should have the power of producing at the same time three distinct female forms and a male ; and that an ...
... observed , with some dimorphic plants . It certainly at first appears a highly remarkable fact that the same female butterfly should have the power of producing at the same time three distinct female forms and a male ; and that an ...
Page 60
... observed by Mr. Walsh to present in their larval or mature state , or in both states , slight , though constant differences in colour , size , or in the nature of their secretions . In some instances the males alone , in other instances ...
... observed by Mr. Walsh to present in their larval or mature state , or in both states , slight , though constant differences in colour , size , or in the nature of their secretions . In some instances the males alone , in other instances ...
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Common terms and phrases
adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important improved increase in number individual differences inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less likewise males manner Melipona Mivart natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species perfect period pigeons pollen pollen-grains present preserved principle probably produced progenitor quadrupeds rank Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens structure struggle supposed swimbladder tend tendency tion transitional tree variability variations varieties vary widely wings young