The Origin of Species by Means of Natural Selection Or, The Preservation of Favored Races in the Struggle for LifeD. Appleton and Company, 1882 - 458페이지 |
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viii 페이지
... single species On Extinction . On simultaneous changes in the forms of life throughout the world - species to each other and to living species ment of ancient forms the same areas - - - - - On the affinities of extinct On the state of ...
... single species On Extinction . On simultaneous changes in the forms of life throughout the world - species to each other and to living species ment of ancient forms the same areas - - - - - On the affinities of extinct On the state of ...
xv 페이지
... Single Vision ' appeared in 1818. In this paper he distinctly recognises the principle of natural selection , and this is the first recognition which has been indicated ; but he applies it only to the races of man , and to certain ...
... Single Vision ' appeared in 1818. In this paper he distinctly recognises the principle of natural selection , and this is the first recognition which has been indicated ; but he applies it only to the races of man , and to certain ...
xxi 페이지
... single parent - form . In June , 1859 , Professor Huxley gave a lecture before the Royal Institution on the ' Persistent Types of Animal life . ' Referring to such cases , he remarks , " It is difficult to comprehend the meaning of such ...
... single parent - form . In June , 1859 , Professor Huxley gave a lecture before the Royal Institution on the ' Persistent Types of Animal life . ' Referring to such cases , he remarks , " It is difficult to comprehend the meaning of such ...
2 페이지
... single point is discussed in this volume on which facts cannot be adduced , often apparently leading to conclusions directly opposite to those at which I have arrived . A fair result can be obtained only by fully stating and balancing ...
... single point is discussed in this volume on which facts cannot be adduced , often apparently leading to conclusions directly opposite to those at which I have arrived . A fair result can be obtained only by fully stating and balancing ...
8 페이지
... single bud with a new and sometimes widely different character from that of the other buds on the same plant . These bud variations , as they may be named , can be pro- pagated by grafts , offsets , & c . , and sometimes by seed . They ...
... single bud with a new and sometimes widely different character from that of the other buds on the same plant . These bud variations , as they may be named , can be pro- pagated by grafts , offsets , & c . , and sometimes by seed . They ...
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adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formations formerly forms fossil Fritz Müller genera genus geological 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 male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed theory tion variability variations varieties vary whilst whole wings young