The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeJohn Murray, Albemarle Street., 1891 - Всего страниц: 432 |
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Стр. 2
... beak , and tongue , so admir- ably adapted to catch insects under the bark of trees . In the case of the mistletoe , which draws its nourishment from certain trees , which has seeds that must be transported by certain birds , and which ...
... beak , and tongue , so admir- ably adapted to catch insects under the bark of trees . In the case of the mistletoe , which draws its nourishment from certain trees , which has seeds that must be transported by certain birds , and which ...
Стр. 9
... beaks have small feet , and those with long beaks large feet . Hence if man goes on select- ing , and thus augmenting , any peculiarity , he will almost certainly modify unintentionally other parts of the structure , owing to the ...
... beaks have small feet , and those with long beaks large feet . Hence if man goes on select- ing , and thus augmenting , any peculiarity , he will almost certainly modify unintentionally other parts of the structure , owing to the ...
Стр. 15
... beak and large feet ; some of the sub - breeds of runts have very long necks , others very long wings and tails , others singularly short tails . The barb is allied to the carrier , but , instead of a long beak , has a very short and ...
... beak and large feet ; some of the sub - breeds of runts have very long necks , others very long wings and tails , others singularly short tails . The barb is allied to the carrier , but , instead of a long beak , has a very short and ...
Стр. 17
... beak like that of the English carrier , or that of the short - faced tumbler , or barb ; for reversed feathers like those of the Jacobin ; for a crop like that of the pouter ; for tail - feathers like those of the fantail . Hence it ...
... beak like that of the English carrier , or that of the short - faced tumbler , or barb ; for reversed feathers like those of the Jacobin ; for a crop like that of the pouter ; for tail - feathers like those of the fantail . Hence it ...
Стр. 19
... beak of the carrier , the shortness of that of the tumbler , and the number of tail - feathers in the fantail ; and the explanation of this fact will be obvious when we treat of Selection . Fourthly , pigeons have been watched and ...
... beak of the carrier , the shortness of that of the tumbler , and the number of tail - feathers in the fantail ; and the explanation of this fact will be obvious when we treat of Selection . Fourthly , pigeons have been watched and ...
Другие издания - Просмотреть все
The Origin of Species by Means of Natural Selection: Or, The ..., Том 1 Charles Darwin Полный просмотр - 1889 |
The Origin of Species by Means of Natural Selection: Or, the ..., Том 1 Charles Darwin Полный просмотр - 1898 |
Часто встречающиеся слова и выражения
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 facts 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 occur 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