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. 141
... marked by a small numbered letter , a sufficient amount of variation is supposed to have been accumu- lated to form it into a fairly well - marked variety , such as would be thought worthy of record in a systematic work . The intervals ...
... marked by a small numbered letter , a sufficient amount of variation is supposed to have been accumu- lated to form it into a fairly well - marked variety , such as would be thought worthy of record in a systematic work . The intervals ...
Стр. 145
... marked varieties ( w10 and 210 ) or two species , according to the amount of change supposed to be represented between the horizontal lines . After fourteen thousand genera- tions , six new species , marked by the letters n14 to 214 ...
... marked varieties ( w10 and 210 ) or two species , according to the amount of change supposed to be represented between the horizontal lines . After fourteen thousand genera- tions , six new species , marked by the letters n14 to 214 ...
Стр. 149
... marked a1 to p1 , those marked b11 and f1a , and those marked o1 to m1 , will form three very distinct genera . We shall also have two very dis- tinct genera descended from ( I ) , differing widely from the descendants of ( A ) . These ...
... marked a1 to p1 , those marked b11 and f1a , and those marked o1 to m1 , will form three very distinct genera . We shall also have two very dis- tinct genera descended from ( I ) , differing widely from the descendants of ( A ) . These ...
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