On the Origin of the Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page viii
... offspring not uni- versal — Hybrids and mongrels compared independently of their fertility Summary Page 299-344 .. CHAPTER IX . ON THE IMPERFECTION OF THE GEOLOGICAL RECORD . On the absence of intermediate varieties at the present day ...
... offspring not uni- versal — Hybrids and mongrels compared independently of their fertility Summary Page 299-344 .. CHAPTER IX . ON THE IMPERFECTION OF THE GEOLOGICAL RECORD . On the absence of intermediate varieties at the present day ...
Page 8
... offspring are either definite or in- definite . They may be considered as definite when all or nearly all the offspring of individuals exposed to certain conditions during several generations are modi- fied in the same manner . It is ...
... offspring are either definite or in- definite . They may be considered as definite when all or nearly all the offspring of individuals exposed to certain conditions during several generations are modi- fied in the same manner . It is ...
Page 11
... offspring somewhat unlike their parents . I may add , that as some organisms breed freely under the most unnatural conditions ( for instance , rabbits and ferrets kept in hutches ) , showing that their reproductive organs are not ...
... offspring somewhat unlike their parents . I may add , that as some organisms breed freely under the most unnatural conditions ( for instance , rabbits and ferrets kept in hutches ) , showing that their reproductive organs are not ...
Page 15
... offspring at a corresponding age , though sometimes earlier . In many cases this could not be otherwise : thus the inherited peculiarities in the horns of cattle could appear only in the offspring when nearly mature ; peculiarities in ...
... offspring at a corresponding age , though sometimes earlier . In many cases this could not be otherwise : thus the inherited peculiarities in the horns of cattle could appear only in the offspring when nearly mature ; peculiarities in ...
Page 18
... offspring of any single species , then such facts would . have great weight in making us doubt about the immu- tability of the many very closely allied natural species —for instance , of the many foxes - inhabiting different quarters of ...
... offspring of any single species , then such facts would . have great weight in making us doubt about the immu- tability of the many very closely allied natural species —for instance , of the many foxes - inhabiting different quarters of ...
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Common terms and phrases
accumulated adapted admit affinities allied species America analogous ancient appear archipelago Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common continuous crossed crustaceans degree developed difficulty distinct species divergence doubt eggs embryo existing exterminated extinct extremely facts favourable females fertilised fertility flowers formation forms fossil Fritz Müller Gärtner genera genus geological Glacial period gradations greater number groups of species habits Hence hermaphrodites hive-bee hybrids important individuals inhabitants inherited insects instance instincts intercrossing larvæ less living males mammals manner migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation parent perfect pigeons pistil pollen present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble rudimentary organs seeds sexual sexual selection Silurian slight South America stamens sterility structure struggle successive suppose theory tion variability variations vary whilst whole