Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1884 - Всего страниц: 351 |
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Стр. 2
... position . For instance , the tendril of Cobæa first rises vertically up , with its branches divergent and with the terminal hooks turned outward ; the young shoot at the extremity of the stem is at the same time bent to one side , so ...
... position . For instance , the tendril of Cobæa first rises vertically up , with its branches divergent and with the terminal hooks turned outward ; the young shoot at the extremity of the stem is at the same time bent to one side , so ...
Стр. 3
... position in a glass of water in the dark , the extremity will , in a few hours , bend upward ; and , if the position of the shoot be then . reversed , the downward - bent shoot reverses its curvature ; but if the stolon of a strawberry ...
... position in a glass of water in the dark , the extremity will , in a few hours , bend upward ; and , if the position of the shoot be then . reversed , the downward - bent shoot reverses its curvature ; but if the stolon of a strawberry ...
Стр. 20
... position on the summit of the column . From the analogy of many plants we may in- fer that a long , spur - like nectary is primarily adapted to secrete and hold a store of nectar ; but in many orchids it has so far lost this function ...
... position on the summit of the column . From the analogy of many plants we may in- fer that a long , spur - like nectary is primarily adapted to secrete and hold a store of nectar ; but in many orchids it has so far lost this function ...
Стр. 21
... position of a lower petal , so that insects can easily visit the flower ; but from slow changes in the form or position of the petals , or from new sorts of in- sects visiting the flowers , it might be advantageous to the plant that the ...
... position of a lower petal , so that insects can easily visit the flower ; but from slow changes in the form or position of the petals , or from new sorts of in- sects visiting the flowers , it might be advantageous to the plant that the ...
Стр. 22
... position by the ovarium being twisted twice as much as is usual . Again , we have seen that in most Vandea there is a plain relation between the depth of the stigmatic chamber and the length of the pedicel , by which the pollen - masses ...
... position by the ovarium being twisted twice as much as is usual . Again , we have seen that in most Vandea there is a plain relation between the depth of the stigmatic chamber and the length of the pedicel , by which the pollen - masses ...
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Darwinism Stated by Darwin Himself: Characteristic Passages from the ... Charles Darwin Полный просмотр - 1884 |
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Darwinism stated by Darwin himself: Characteristic passages from the ... Charles Darwin Ограниченный просмотр - 2023 |
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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