Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 47
... breed , in accordance with a preconceived idea ; and by thus adding up variations , often so slight as to be imperceptible by an uneducated eye , he has effected wonderful changes and improvements . It can , also , be clearly shown that ...
... breed , in accordance with a preconceived idea ; and by thus adding up variations , often so slight as to be imperceptible by an uneducated eye , he has effected wonderful changes and improvements . It can , also , be clearly shown that ...
Стр. 48
Characteristic Passages from the Writings of Charles Darwin Charles Darwin. of improving the breed , by preserving in ... breeds show adaptation to his wants and pleas- ures . We can further understand how it is that domestic races of ...
Characteristic Passages from the Writings of Charles Darwin Charles Darwin. of improving the breed , by preserving in ... breeds show adaptation to his wants and pleas- ures . We can further understand how it is that domestic races of ...
Стр. 52
... breeds ; and that some of these ancient breeds closely resemble or are even identical with , those still existing . But this only throws far backward the history of civilization , and shows that animals were domesticated at a much ...
... breeds ; and that some of these ancient breeds closely resemble or are even identical with , those still existing . But this only throws far backward the history of civilization , and shows that animals were domesticated at a much ...
Стр. 53
... breeds are not 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 ...
... breeds are not 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 ...
Стр. 54
... breed- ing on precipices , and good fliers , are unlikely to be ex- terminated ; and the common rock - pigeon , which has the same habits with the domestic breeds , has not been exter- minated even on several of the smaller British ...
... breed- ing on precipices , and good fliers , are unlikely to be ex- terminated ; and the common rock - pigeon , which has the same habits with the domestic breeds , has not been exter- minated even on several of the smaller British ...
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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