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. 30
... distinct breeds . Now , hardly any cases have been ascertained with certainty of hybrids from two quite distinct species of animals being perfectly fertile . Some authors believe that long - continued domestication eliminates this ...
... distinct breeds . Now , hardly any cases have been ascertained with certainty of hybrids from two quite distinct species of animals being perfectly fertile . Some authors believe that long - continued domestication eliminates this ...
Стр. 122
... distinct variety having a prepotent effect over the flower's own pollen ; and that this is part of the general law of good being derived from the intercrossing of distinct indi- viduals of the same species . When distinct species are ...
... distinct variety having a prepotent effect over the flower's own pollen ; and that this is part of the general law of good being derived from the intercrossing of distinct indi- viduals of the same species . When distinct species are ...
Стр. 156
... distinct forms might arise . But , as I remarked towards the close of the Introduction , no one ought to feel surprise at much remaining as yet unexplained on the origin of species , if we make due allowance for our profound ignorance ...
... distinct forms might arise . But , as I remarked towards the close of the Introduction , no one ought to feel surprise at much remaining as yet unexplained on the origin of species , if we make due allowance for our profound ignorance ...
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