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. 79
... produced than can possibly survive , there must in every case be a struggle for existence , either one individual ... produced only two seeds - and there is no plant so unproductive as this - and their seedlings next year produced two ...
... produced than can possibly survive , there must in every case be a struggle for existence , either one individual ... produced only two seeds - and there is no plant so unproductive as this - and their seedlings next year produced two ...
Стр. 142
... produced two varieties , namely m2 and s2 , differing from each other , and more considerably from their common ... producing only a single variety , but in a more and more modified condition , some producing two or three varieties , and ...
... produced two varieties , namely m2 and s2 , differing from each other , and more considerably from their common ... producing only a single variety , but in a more and more modified condition , some producing two or three varieties , and ...
Стр. 322
... produced by the same unknown causes which produce slight deviations of bodily structure . No complex instinct can possibly be produced through natural selection , except by the slow and gradual accu- mulation of numerous slight , yet ...
... produced by the same unknown causes which produce slight deviations of bodily structure . No complex instinct can possibly be produced through natural selection , except by the slow and gradual accu- mulation of numerous slight , yet ...
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