The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volume 1D. Appleton, 1898 - Evolution |
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Page xiv
... crossing of already existing forms , and much to use and disuse , that is , to the effects of habit . To this latter agency he seems to attribute all the beautiful adaptations in nature ; -such as the long neck of the giraffe for ...
... crossing of already existing forms , and much to use and disuse , that is , to the effects of habit . To this latter agency he seems to attribute all the beautiful adaptations in nature ; -such as the long neck of the giraffe for ...
Page 10
... crossing of distinct species , and that which may be observed with plants and ani- mals when reared under new or unnatural condi- tions . Many facts clearly show how eminently sus- ceptible the reproductive system is to very slight ...
... crossing of distinct species , and that which may be observed with plants and ani- mals when reared under new or unnatural condi- tions . Many facts clearly show how eminently sus- ceptible the reproductive system is to very slight ...
Page 18
... crossed , a subject hereafter to be discussed ) , domestic races of the same species differ from each other in the same manner as do the closely- allied species of the same genus in a state of nature , but the differences in most cases ...
... crossed , a subject hereafter to be discussed ) , domestic races of the same species differ from each other in the same manner as do the closely- allied species of the same genus in a state of nature , but the differences in most cases ...
Page 21
... , that all the races belong to the same species . Having kept nearly all the English breeds of the fowl alive , having bred and crossed them , and examined their skeletons ,. CHAP . I. ] CHARACTER OF DOMESTIC VARIETIES . 21.
... , that all the races belong to the same species . Having kept nearly all the English breeds of the fowl alive , having bred and crossed them , and examined their skeletons ,. CHAP . I. ] CHARACTER OF DOMESTIC VARIETIES . 21.
Page 22
... crossed them , and examined their skeletons , it appears to me almost certain that all are the descendants of the wild Indian fowl , Gallus bankiva ; and this is the conclusion of Mr. Blyth , and of others who have studied this bird in ...
... crossed them , and examined their skeletons , it appears to me almost certain that all are the descendants of the wild Indian fowl , Gallus bankiva ; and this is the conclusion of Mr. Blyth , and of others who have studied this bird in ...
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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 descendants 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 increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young