The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Том 1AMS Press, 1972 - Всего страниц: 479 This is a reproduction of the original artefact. Generally these books are created from careful scans of the original. This allows us to preserve the book accurately and present it in the way the author intended. Since the original versions are generally quite old, there may occasionally be certain imperfections within these reproductions. We're happy to make these classics available again for future generations to enjoy! |
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Стр. 18
... races of our domestic animals and plants , and compare them with closely allied species , we generally perceive in each domestic race , as already remarked , less uniformity of character than in true species . Domestic races often have ...
... races of our domestic animals and plants , and compare them with closely allied species , we generally perceive in each domestic race , as already remarked , less uniformity of character than in true species . Domestic races often have ...
Стр. 23
... races by crossing has been greatly exaggerated . Many cases are on record , showing that a race may be modified by occasional crosses , if aided by the careful selection of the individuals which present the desired character ; but to ...
... races by crossing has been greatly exaggerated . Many cases are on record , showing that a race may be modified by occasional crosses , if aided by the careful selection of the individuals which present the desired character ; but to ...
Стр. 194
... races . The frequent presence of fourteen or even sixteen tail - feathers in the pouter may be con- sidered as a variation representing the normal structure of another race , the fantail . I presume that no one will doubt that all such ...
... races . The frequent presence of fourteen or even sixteen tail - feathers in the pouter may be con- sidered as a variation representing the normal structure of another race , the fantail . I presume that no one will doubt that all such ...
Содержание
CHAPTER I | 5 |
VARIATION UNDER NATURE | 51 |
Its bearing on natural selectionThe term used in a wide sense | 75 |
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The Origin of Species by Means of Natural Selection: Or, the Preservation of ... Charles Darwin Недоступно для просмотра - 2016 |
The Origin of Species by Means of Natural Selection: Or the Preservation of ... Charles Darwin Недоступно для просмотра - 2018 |
Часто встречающиеся слова и выражения
acquired adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree developed difficulty distinct species disuse domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important improved increase in number individual differences inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less likewise males manner Melipona Mivart natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species perfect period pigeons pollen pollen-grains present preserved principle probably produced progenitor quadrupeds rank Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion transitional tree variability variations varieties vary widely wings young