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. 107
... adapted individuals , supposing that there is any variability in a favourable direction , will tend to propagate their kind in larger numbers than the less well adapted . If the numbers be wholly kept down by the causes just indicated ...
... adapted individuals , supposing that there is any variability in a favourable direction , will tend to propagate their kind in larger numbers than the less well adapted . If the numbers be wholly kept down by the causes just indicated ...
Стр. 139
... adapted for their own country . It might also , perhaps , have been expected that naturalised plants would have be- longed to a few groups more especially adapted to certain stations in their new homes . But the case is very dif- ferent ...
... adapted for their own country . It might also , perhaps , have been expected that naturalised plants would have be- longed to a few groups more especially adapted to certain stations in their new homes . But the case is very dif- ferent ...
Стр. 288
... adapted solely for grazing , or even a member with a beak having less well - developed lamellæ , might be converted by small changes into a species like the Egyptian gooзe , -this into one like the common duck , -and , lastly , into one ...
... adapted solely for grazing , or even a member with a beak having less well - developed lamellæ , might be converted by small changes into a species like the Egyptian gooзe , -this into one like the common duck , -and , lastly , into one ...
Содержание
CHAPTER I | 5 |
VARIATION UNDER NATURE | 51 |
Its bearing on natural selectionThe term used in a wide sense | 75 |
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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