Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 40
... land ; so that the whole superficial bed of vegetable mold passes through their bodies in the course of every few years . From the collapsing of the old burrows the mold is in constant though slow move- ment , and the particles ...
... land ; so that the whole superficial bed of vegetable mold passes through their bodies in the course of every few years . From the collapsing of the old burrows the mold is in constant though slow move- ment , and the particles ...
Стр. 41
... land is quite level and is covered with herbage , and where the climate is humid so that much dust can not be blown away , it appears at first sight impossible that there should be any appreciable amount of subaërial denudation ; but ...
... land is quite level and is covered with herbage , and where the climate is humid so that much dust can not be blown away , it appears at first sight impossible that there should be any appreciable amount of subaërial denudation ; but ...
Стр. 42
... land . It is known from the amount of sediment annually delivered into the sea by the Missis- sippi , that its enormous drainage - area must on an average be lowered 00263 of an inch each year ; and this would suffice in four and a half ...
... land . It is known from the amount of sediment annually delivered into the sea by the Missis- sippi , that its enormous drainage - area must on an average be lowered 00263 of an inch each year ; and this would suffice in four and a half ...
Стр. 43
... land - mollusks , leaves , twigs , etc. , are before long all buried beneath the accumulating cast- ings of worms , and are thus brought in a more or less decayed state within reach of the roots of plants . Worms likewise drag an ...
... land - mollusks , leaves , twigs , etc. , are before long all buried beneath the accumulating cast- ings of worms , and are thus brought in a more or less decayed state within reach of the roots of plants . Worms likewise drag an ...
Стр. 44
... land was in fact regularly plowed , and still continues to be thus plowed , by earth - worms . It may be doubted whether there are many other animals which have played so important a part in the history of the world as have these lowly ...
... land was in fact regularly plowed , and still continues to be thus plowed , by earth - worms . It may be doubted whether there are many other animals which have played so important a part in the history of the world as have these lowly ...
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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