Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1884 - Всего страниц: 351 |
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Стр. 4
... namely , the several species of Big- nonia , Eccremocarpus , Cobæa , and Ampelopsis . But even in the thickets of our temperate regions the number of climbing species and individuals is considerable , as will be found by counting them ...
... namely , the several species of Big- nonia , Eccremocarpus , Cobæa , and Ampelopsis . But even in the thickets of our temperate regions the number of climbing species and individuals is considerable , as will be found by counting them ...
Стр. 6
... namely , that the individuals of the same species growing in a state of nature near together have not really been subjected during several previous generations to quite the same conditions . POTENCY OF THE SEXUAL ELEMENTS IN PLANTS ...
... namely , that the individuals of the same species growing in a state of nature near together have not really been subjected during several previous generations to quite the same conditions . POTENCY OF THE SEXUAL ELEMENTS IN PLANTS ...
Стр. 17
... 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 , which produce none . The most skillful cul- tivators ...
... 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 , which produce none . The most skillful cul- tivators ...
Стр. 18
... namely , one anther and two generally confluent stigmas ; with the third stigma modified into the rostellum and incapable of being fer- tilized ; and with three of the anthers no longer function- ally active , but serving either to ...
... namely , one anther and two generally confluent stigmas ; with the third stigma modified into the rostellum and incapable of being fer- tilized ; and with three of the anthers no longer function- ally active , but serving either to ...
Стр. 20
... namely , by less and less nectar being secreted from the inner membrane , with more and more retained within the intercellular spaces . Other analogous cases could be given . Although an organ may not have been originally formed for ...
... namely , by less and less nectar being secreted from the inner membrane , with more and more retained within the intercellular spaces . Other analogous cases could be given . Although an organ may not have been originally formed for ...
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acquired action admit allied apes appear Asa Gray become believe birds blush body breeds Catarrhine cause characters closely Cloth Darwin degree descended developed distinct species domestic doubt early effects eggs existence expression extinct eyes fact favorable feel females fertilization forms gemmules genera geotropism habit hair HERBERT SPENCER hermaphrodites highly horse Illustrations increase individuals inhabitants inherited insects instance intermediate islands kind labellum lancelet language larvæ less living lower animals males mammals manner ment mental mind modified monkeys movements muscles natural selection naturalists observed offspring organic Origin of Species papillæ parent peculiar period plants pollen possess present principle probably produced Professor progenitors Quadrumana quadrupeds races remarkable resemble rudimentary savages seeds seems seen sexes sexual selection slight South America structure suppose T. H. HUXLEY tend tendency tion transmitted utricle variability variations varieties various vertebræ whole wild worms young