The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
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Page 22
... 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 India . In regard to ducks and rabbits , some breeds of which differ much from each other , 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 India . In regard to ducks and rabbits , some breeds of which differ much from each other , the ...
Page 29
... descendants reverting to an ancestor of foreign blood , removed by a greater number of generations . In a breed which has been crossed only once , the tendency to revert to any character derived from such a cross will naturally become ...
... descendants reverting to an ancestor of foreign blood , removed by a greater number of generations . In a breed which has been crossed only once , the tendency to revert to any character derived from such a cross will naturally become ...
Page 33
... learn a lesson of caution , when they deride the idea of species in a state of nature being lineal descendants of other species ? Principles of Selection anciently followed , and their Effects . CHAP . I. ] 33 DOMESTIC PIGEONS .
... learn a lesson of caution , when they deride the idea of species in a state of nature being lineal descendants of other species ? Principles of Selection anciently followed , and their Effects . CHAP . I. ] 33 DOMESTIC PIGEONS .
Page 44
... descendants of that pigeon would be- come through long - continued , partly unconscious and partly methodical , selection . Perhaps the parent - bird of all fantails had only fourteen tail - feathers somewhat expanded , like the present ...
... descendants of that pigeon would be- come through long - continued , partly unconscious and partly methodical , selection . Perhaps the parent - bird of all fantails had only fourteen tail - feathers somewhat expanded , like the present ...
Page 74
... descendants . But by steps hereafter to be explained , the larger genera also tend to break up into smaller genera . And thus , the forms of life throughout the universe become divid- ed into groups subordinate to groups . CHAPTER III ...
... descendants . But by steps hereafter to be explained , the larger genera also tend to break up into smaller genera . And thus , the forms of life throughout the universe become divid- ed into groups subordinate to groups . CHAPTER III ...
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Common terms and phrases
adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young