The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1920 - 432페이지 |
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xi 페이지
... modified . On the modification of the eye . Transitions through the acceleration or retardation of the period of reproduction . Fifth Sixth Edition . Edition . Chief Additions and Corrections ADDITIONS AND CORRECTIONS, TO THE SIXTH ...
... modified . On the modification of the eye . Transitions through the acceleration or retardation of the period of reproduction . Fifth Sixth Edition . Edition . Chief Additions and Corrections ADDITIONS AND CORRECTIONS, TO THE SIXTH ...
xii 페이지
... modified state , taken from chap . iv . of the former editions . The latter and larger part is new , and relates chiefly to the supposed incompetency of natural selection to account for the incipient stages of useful structures . There ...
... modified state , taken from chap . iv . of the former editions . The latter and larger part is new , and relates chiefly to the supposed incompetency of natural selection to account for the incipient stages of useful structures . There ...
xix 페이지
... modified ; and he attributes the modification to the change of circumstances . The author ( 1855 ) has also treated Psychology on the principle of the necessary acquirement of each mental power and capacity by gradation . In 1852 M ...
... modified ; and he attributes the modification to the change of circumstances . The author ( 1855 ) has also treated Psychology on the principle of the necessary acquirement of each mental power and capacity by gradation . In 1852 M ...
xx 페이지
... modified . The distinction of species he explains by the destruction of inter- mediate graduated forms . " Thus ... modification of species . The ' Philosophy of Creation ' has been treated in a masterly manner by the Rev. Baden Powell ...
... modified . The distinction of species he explains by the destruction of inter- mediate graduated forms . " Thus ... modification of species . The ' Philosophy of Creation ' has been treated in a masterly manner by the Rev. Baden Powell ...
xxi 페이지
... modification of pre - existing species a hypothesis which , though unproven , and sadly damaged by some of its sup- porters , is yet the only one to which physiology lends any counte- nance ; their existence would seem to show that the ...
... modification of pre - existing species a hypothesis which , though unproven , and sadly damaged by some of its sup- porters , is yet the only one to which physiology lends any counte- nance ; their existence would seem to show that the ...
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accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely fact favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young