The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, Выпуск 5D. Appleton, 1896 |
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... variations not supervening at any early age , and being inherited at a corresponding age - RUDIMENTARY ORGANS ; their origin ex- plained - Summary ·· .. .. Page 202 CHAPTER XV . RECAPITULATION AND CONCLUSION . Recapitulation of the ...
... variations not supervening at any early age , and being inherited at a corresponding age - RUDIMENTARY ORGANS ; their origin ex- plained - Summary ·· .. .. Page 202 CHAPTER XV . RECAPITULATION AND CONCLUSION . Recapitulation of the ...
Стр. 20
... variation , spontaneously appeared in certain individuals of one variety when crossed with those of another variety . For it would clearly be advantageous to two varieties or incipient species , if they could be kept from blending , on ...
... variation , spontaneously appeared in certain individuals of one variety when crossed with those of another variety . For it would clearly be advantageous to two varieties or incipient species , if they could be kept from blending , on ...
Стр. 57
... variations or individual differences of the right nature , by which some of the inhabitants might be better fitted to their new places under the altered circumstances , would not always occur at once . Unfortunately we have no means of ...
... variations or individual differences of the right nature , by which some of the inhabitants might be better fitted to their new places under the altered circumstances , would not always occur at once . Unfortunately we have no means of ...
Стр. 75
... variation , but the geological record would then be : less perfect . It may be doubted whether the duration of any one great period of subsidence over the whole or part of the archipelago , together with a contemporaneous accumula- tion ...
... variation , but the geological record would then be : less perfect . It may be doubted whether the duration of any one great period of subsidence over the whole or part of the archipelago , together with a contemporaneous accumula- tion ...
Стр. 89
... variation and natural selection . New species have appeared very slowly , one after another , both on the land and in the waters . Lyell has shown that it is hardly possible to resist the evidence on this head in the case of the several ...
... variation and natural selection . New species have appeared very slowly , one after another , both on the land and in the waters . Lyell has shown that it is hardly possible to resist the evidence on this head in the case of the several ...
Другие издания - Просмотреть все
The Origin of Species by Means of Natural Selection: Or, The ..., Том 2 Charles Darwin Полный просмотр - 1888 |
The Origin of Species by Means of Natural Selection, Or, The ..., Том 2 Charles Darwin Полный просмотр - 1896 |
The Origin of Species by Means of Natural Selection, Or, The ..., Том 2 Charles Darwin Полный просмотр - 1896 |
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accumulated adapted admit affinity allied species ancient animals appear Archipelago arctic areas become beds believe birds breeds Cambrian changes characters classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo 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 mammæ mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation paleozoic parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian South America species belonging stage stamens sterility structure successive suppose terrestrial tertiary tion variations varieties whilst widely different wings