The Origin of Species by Means of Natural Selection; Or, the Preservation of Favored Races in the Struggle for Life ...A.L. Burt, 1890 - 538페이지 |
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... inheritance as the anomaly . The laws governing inheritance are for the most part unknown . No one can say why the same peculiarity in different individuals of the same species , or in different species , is sometimes inherited and ...
... inheritance as the anomaly . The laws governing inheritance are for the most part unknown . No one can say why the same peculiarity in different individuals of the same species , or in different species , is sometimes inherited and ...
247 페이지
Charles Darwin. INHERITED CHANGES OF HABIT OR INSTINCT IN DOMES- TICATED ANIMALS . The possibility , or even probability , of inherited varia- tions of instinct in a state of nature will be strengthened by briefly considering a few cases ...
Charles Darwin. INHERITED CHANGES OF HABIT OR INSTINCT IN DOMES- TICATED ANIMALS . The possibility , or even probability , of inherited varia- tions of instinct in a state of nature will be strengthened by briefly considering a few cases ...
463 페이지
... inherited at a corresponding not early period . But the case of the short - faced tumbler , which when twelve hours old possessed its proper characters , proves that this is not the universal rule ; for here the characteristic ...
... inherited at a corresponding not early period . But the case of the short - faced tumbler , which when twelve hours old possessed its proper characters , proves that this is not the universal rule ; for here the characteristic ...
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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 lamellæ larvæ 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