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 x
... On fertile hybrid moths . The discussion on the fertility of hybrids not having been acquired through natural selection condensed and modified . Fifth Sixth Edition . Edition . Chief Additions and Corrections X ADDITIONS AND CORRECTIONS .
... On fertile hybrid moths . The discussion on the fertility of hybrids not having been acquired through natural selection condensed and modified . Fifth Sixth Edition . Edition . Chief Additions and Corrections X ADDITIONS AND CORRECTIONS .
Page 3
... acquire that perfec- tion of structure and coadaptation which justly excites our admiration . Naturalists continually refer to ex- ternal conditions , such as climate , food , & c . , as the only possible cause of variation . In one ...
... acquire that perfec- tion of structure and coadaptation which justly excites our admiration . Naturalists continually refer to ex- ternal conditions , such as climate , food , & c . , as the only possible cause of variation . In one ...
Page 17
... acquired characters , whilst kept under the same conditions , and whilst kept in a considerable body , so that free intercrossing might check , by blending together , any slight deviations in their structure , in such case , I grant ...
... acquired characters , whilst kept under the same conditions , and whilst kept in a considerable body , so that free intercrossing might check , by blending together , any slight deviations in their structure , in such case , I grant ...
Page 25
... acquired varies , as does the state of the down with which the nestling birds are clothed when hatched . The shape and size of the eggs vary . The manner of flight , and in some breeds the voice and disposition , differ remarkably ...
... acquired varies , as does the state of the down with which the nestling birds are clothed when hatched . The shape and size of the eggs vary . The manner of flight , and in some breeds the voice and disposition , differ remarkably ...
Page 28
... are very apt suddenly to acquire these characters . To give one instance out of several which I have observed : -I crossed some white fantails , which breed very true , with some black barbs - and it 28 [ CHAP . I. DOMESTIC PIGEONS .
... are very apt suddenly to acquire these characters . To give one instance out of several which I have observed : -I crossed some white fantails , which breed very true , with some black barbs - and it 28 [ CHAP . I. DOMESTIC PIGEONS .
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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