The Origin of Species by Means of Natural Selection; Or, the Preservation of Favored Races in the Struggle for Life ...A.L. Burt, 1890 - 538ÆäÀÌÁö |
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110 ÆäÀÌÁö
... modified descendants of the common parent ( A ) , will generally go on increasing in number and diverg- ing in ... modified descendant ; for natural selection will always act according to the nature of the places which are either ...
... modified descendants of the common parent ( A ) , will generally go on increasing in number and diverg- ing in ... modified descendant ; for natural selection will always act according to the nature of the places which are either ...
113 ÆäÀÌÁö
... modified descendants , four- teen in number at the fourteen - thousandth generation , will probably have inherited some of the same advantages ; they have also been modified and improved in a diversified manner at each stage of descent ...
... modified descendants , four- teen in number at the fourteen - thousandth generation , will probably have inherited some of the same advantages ; they have also been modified and improved in a diversified manner at each stage of descent ...
436 ÆäÀÌÁö
... modified descendants to the present day , repre- sented by the fifteen genera ( a14 to z14 ) on the uppermost horizontal line . Now , all these modified descendants from a single species are related in blood or descent in the same ...
... modified descendants to the present day , repre- sented by the fifteen genera ( a14 to z14 ) on the uppermost horizontal line . Now , all these modified descendants from a single species are related in blood or descent in the same ...
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adapted admit affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied color continued crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favorable females fertility flowers formation forms fossil Fritz Müller genera genus geological geological period gilt top Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamell©¡ larv©¡ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest oceanic islands offspring organs parent peculiar perfect pigeons pistil pollen present principle probably produced quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive suppose tend theory tion variability variations varieties vary whole widely different wings young