Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 17
... varieties in the United States consist of three forms , namely , females , which produce a heavy crop of fruit ; of hermaphrodites , which " seldom produce other than a very scanty crop of inferior and imperfect berries " ; and of males ...
... varieties in the United States consist of three forms , namely , females , which produce a heavy crop of fruit ; of hermaphrodites , which " seldom produce other than a very scanty crop of inferior and imperfect berries " ; and of males ...
Стр. 21
... varieties which had their ovaria less and less twisted ; but , if the plant only afforded varieties with the ovarium more twisted ,. THE MOVEMENTS AND HABITS OF PLANTS . 21 An Illustration.
... varieties which had their ovaria less and less twisted ; but , if the plant only afforded varieties with the ovarium more twisted ,. THE MOVEMENTS AND HABITS OF PLANTS . 21 An Illustration.
Стр. 22
Characteristic Passages from the Writings of Charles Darwin Charles Darwin. plant only afforded varieties with the ovarium more twisted , the same end could be attained by the selection of such variations , until the flower was turned ...
Characteristic Passages from the Writings of Charles Darwin Charles Darwin. plant only afforded varieties with the ovarium more twisted , the same end could be attained by the selection of such variations , until the flower was turned ...
Стр. 49
... varieties to drop off ; and one of the " crackers " ( i . e . , Virginia squatters ) added , " We select the black members of a litter for rais- ing , as they alone have a good chance of living . " Hair- less dogs have imperfect teeth ...
... varieties to drop off ; and one of the " crackers " ( i . e . , Virginia squatters ) added , " We select the black members of a litter for rais- ing , as they alone have a good chance of living . " Hair- less dogs have imperfect teeth ...
Стр. 53
... varieties , and have not pro- ceeded from the rock - pigeon , they must have descended from at least seven or eight aboriginal stocks ; for it is impossible to make the present domestic breeds by the crossing of any lesser number : how ...
... varieties , and have not pro- ceeded from the rock - pigeon , they must have descended from at least seven or eight aboriginal stocks ; for it is impossible to make the present domestic breeds by the crossing of any lesser number : how ...
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Часто встречающиеся слова и выражения
acid acquired action adapted admit allied animals apes appear become believe birds body breeds cause character climate closely compared cotyledons crossed degree descended developed distinct species disuse domestic doubt early effects eggs embryo existence extinct eyes fact female fertilization forms gemmules genera genus geotropism Glacial habits hairs hermaphrodites highly horses increase individuals inhabitants inherited insects instance instincts islands kinds labellum lancelet larvæ leaves less living lower animals Malaxis paludosa males mammals manner mental millimetre modified monkeys movements muscles natural selection naturalists observed occasionally offspring organs Origin of Species ovules papillæ parent peculiar period pigeon plants points pollen pollinium possess present prey probably produced progenitors Quadrumana quadrupeds races radicles remarkable resemble rudimentary savages seedlings seeds seems sexes sexual elements sexual selection slight structure suppose surface tend tendency tion transmitted utricle variability variations varieties various vertebræ whole wild worms young