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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vii 페이지
... first crosses and of hybrids - Sterility various in degree , not universal , affected by close interbreeding , removed by domestication - Laws governing the sterility of hybrids - Sterility not a special endowment , but incidental on ...
... first crosses and of hybrids - Sterility various in degree , not universal , affected by close interbreeding , removed by domestication - Laws governing the sterility of hybrids - Sterility not a special endowment , but incidental on ...
xi 페이지
... first . The third edition was largely corrected and added to , and the fourth and fifth still more largely . As copies of the present work will be sent abroad , it may be of use if I specify the state of the foreign editions . The third ...
... first . The third edition was largely corrected and added to , and the fourth and fifth still more largely . As copies of the present work will be sent abroad , it may be of use if I specify the state of the foreign editions . The third ...
xiii 페이지
... FIRST EDITION OF THIS WORK . I WILL here give a brief sketch of the progress of opinion on the Origin of Species . Until recently the great majority of natural- ists believed that species were immutable productions , and had been ...
... FIRST EDITION OF THIS WORK . I WILL here give a brief sketch of the progress of opinion on the Origin of Species . Until recently the great majority of natural- ists believed that species were immutable productions , and had been ...
xiv 페이지
... first did the eminent service of arousing attention to the probability of all change in the organic , as well as in the inorganic world , being the result of law , and not of miraculous interposition . Lamarck seems to have been chiefly ...
... first did the eminent service of arousing attention to the probability of all change in the organic , as well as in the inorganic world , being the result of law , and not of miraculous interposition . Lamarck seems to have been chiefly ...
xv 페이지
... first recognition which has been indicated ; but he applies it only to the races of man , and to certain characters alone . After remarking that negroes and mulattoes enjoy an immunity from certain tropical diseases , he observes ...
... first recognition which has been indicated ; but he applies it only to the races of man , and to certain characters alone . After remarking that negroes and mulattoes enjoy an immunity from certain tropical diseases , he observes ...
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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