Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 2
... seedlings before they Page 3 . have broken through the ground , as well as their buried radicles , circumnutate , as far as the pressure of the surrounding earth permits . In this universally present movement we have the basis or ...
... seedlings before they Page 3 . have broken through the ground , as well as their buried radicles , circumnutate , as far as the pressure of the surrounding earth permits . In this universally present movement we have the basis or ...
Стр. 9
... Seedlings from a cross of this kind grow with great vigor , and trans- mit their vigor to their descendants . These , therefore , in the struggle for life , will generally beat and exterminate the seedlings from plants which have long ...
... Seedlings from a cross of this kind grow with great vigor , and trans- mit their vigor to their descendants . These , therefore , in the struggle for life , will generally beat and exterminate the seedlings from plants which have long ...
Стр. 11
... seedlings under the same conditions . But a cross with any other in- dividual of the same variety must be carefully prevented , as each has its own peculiar constitution . After a dozen generations of self - fertilization , it is ...
... seedlings under the same conditions . But a cross with any other in- dividual of the same variety must be carefully prevented , as each has its own peculiar constitution . After a dozen generations of self - fertilization , it is ...
Стр. 17
... incidental result is that the seedlings from an ille- gitimate union are often dwarfed and more or less com- pletely barren , like hybrids from the union of two. THE MOVEMENTS AND HABITS OF PLANTS . 17 Causes of Sterility among Plants.
... incidental result is that the seedlings from an ille- gitimate union are often dwarfed and more or less com- pletely barren , like hybrids from the union of two. THE MOVEMENTS AND HABITS OF PLANTS . 17 Causes of Sterility among Plants.
Стр. 26
... Seedlings are often pro- tected from radiation by a very thin covering of straw ; and fruit - trees on walls by a few fir - branches , or even by a fishing - net , suspended over them . There is a variety of the gooseberry , the flowers ...
... Seedlings are often pro- tected from radiation by a very thin covering of straw ; and fruit - trees on walls by a few fir - branches , or even by a fishing - net , suspended over them . There is a variety of the gooseberry , the flowers ...
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Darwinism stated by Darwin himself: Characteristic passages from the ... Charles Darwin Ограниченный просмотр - 2023 |
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