On the Origin of Species by Means of Natural Selection, Or, The Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 - Всего страниц: 432 |
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Стр. vii
... theory of Natural Selection -Recapitulation of the general and special circumstances in its favour - Causes of the general belief in the immutability of species - How far the theory of Natural Selection may be ex- tended - Effects of ...
... theory of Natural Selection -Recapitulation of the general and special circumstances in its favour - Causes of the general belief in the immutability of species - How far the theory of Natural Selection may be ex- tended - Effects of ...
Стр. 2
... theory , of equal im- portance with the sterility of species ; for it seems to make a broad and clear distinction between varieties and species . Degrees of Sterility . - First , for the sterility of spe- cies when crossed and of their ...
... theory , of equal im- portance with the sterility of species ; for it seems to make a broad and clear distinction between varieties and species . Degrees of Sterility . - First , for the sterility of spe- cies when crossed and of their ...
Стр. 21
... theory of natural selection as to that of special creation , that in reciprocal crosses the male element of one form should have been rendered utterly impotent on a second form , whilst at the same time the male element of this second ...
... theory of natural selection as to that of special creation , that in reciprocal crosses the male element of one form should have been rendered utterly impotent on a second form , whilst at the same time the male element of this second ...
Стр. 22
... theory of natural selection be brought to bear , must have incessantly occurred with many species , for a multitude are mutually quite barren . With sterile neuter insects we have reason to believe that modifica- tions in their ...
... theory of natural selection be brought to bear , must have incessantly occurred with many species , for a multitude are mutually quite barren . With sterile neuter insects we have reason to believe that modifica- tions in their ...
Стр. 49
... theory . The explanation lies , as I believe , in the extreme imper- fection of the geological record . In the first place , it should always be borne in mind what sort of intermediate forms must , on the theory , have formerly existed ...
... theory . The explanation lies , as I believe , in the extreme imper- fection of the geological record . In the first place , it should always be borne in mind what sort of intermediate forms must , on the theory , have formerly existed ...
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
admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds Cambrian changes characters cies classification climate closely allied common progenitor continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo eral Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs sediment seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst widely different wings