The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1920 - 432ÆäÀÌÁö |
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3 ÆäÀÌÁö
... less improved forms of life , and leads to what I have called Diver- gence of Character . In the next chapter I shall discuss the complex and little known laws of variation . In the five succeeding chap- ters , the most apparent and ...
... less improved forms of life , and leads to what I have called Diver- gence of Character . In the next chapter I shall discuss the complex and little known laws of variation . In the five succeeding chap- ters , the most apparent and ...
4 ÆäÀÌÁö
... less do we know of the mutual relations of the innumerable inhabitants of the world during the many past geological epochs in its history . Although much remains obscure , and will long remain obscure , I can entertain no doubt , after ...
... less do we know of the mutual relations of the innumerable inhabitants of the world during the many past geological epochs in its history . Although much remains obscure , and will long remain obscure , I can entertain no doubt , after ...
8 ÆäÀÌÁö
... less and the bones of the leg more , in proportion to the whole skeleton , than do the same bones in the wild duck ; and this change may be safely attributed to the domestic duck flying much less , and walking more , than its wild ...
... less and the bones of the leg more , in proportion to the whole skeleton , than do the same bones in the wild duck ; and this change may be safely attributed to the domestic duck flying much less , and walking more , than its wild ...
9 ÆäÀÌÁö
... less strange and commoner deviations may be freely admitted to be inheritable . Perhaps the correct way of viewing the whole subject would be , to look at the inheritance CHAP . I. ] VARIATION UNDER DOMESTICATION . 9.
... less strange and commoner deviations may be freely admitted to be inheritable . Perhaps the correct way of viewing the whole subject would be , to look at the inheritance CHAP . I. ] VARIATION UNDER DOMESTICATION . 9.
11 ÆäÀÌÁö
... less uniformity of character than in true species . Domestic races often have a somewhat monstrous character ; by which I mean , that , although differing from each other , and from other species of the same genus , in several trifling ...
... less uniformity of character than in true species . Domestic races often have a somewhat monstrous character ; by which I mean , that , although differing from each other , and from other species of the same genus , in several trifling ...
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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 lamell©¡ larv©¡ 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