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. 46
... favourable to Man's Power of Selection . I will now say a few words on the circumstances , favourable , or the reverse , to man's power of selection . A high degree of variability is obviously favourable , as freely giving the materials ...
... favourable to Man's Power of Selection . I will now say a few words on the circumstances , favourable , or the reverse , to man's power of selection . A high degree of variability is obviously favourable , as freely giving the materials ...
Стр. 129
... favourable for the production of new species . But we may thus deceive ourselves , for to ascertain whether a small isolated area , or a large open area like a continent , has been most favourable for the production of new organic forms ...
... favourable for the production of new species . But we may thus deceive ourselves , for to ascertain whether a small isolated area , or a large open area like a continent , has been most favourable for the production of new organic forms ...
Стр. 130
... exposed to less varied , and therefore less severe , competition . To sum up , as far as the extreme intricacy of the subject permits , the circumstances favourable and un- favourable for 130 CIRCUMSTANCES FAVOURABLE TO THE [ CHAP . IV.
... exposed to less varied , and therefore less severe , competition . To sum up , as far as the extreme intricacy of the subject permits , the circumstances favourable and un- favourable for 130 CIRCUMSTANCES FAVOURABLE TO THE [ CHAP . IV.
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