Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. x
... Increase .. . 85 Climate as a Check to Increase Influence of Insects in the Struggle for Existence No such Thing as Change in the Result of the Struggle . 86 . 88 90 V. NATURAL SELECTION ; OR , THE SURVIVAL OF THE. X CONTENTS .
... Increase .. . 85 Climate as a Check to Increase Influence of Insects in the Struggle for Existence No such Thing as Change in the Result of the Struggle . 86 . 88 90 V. NATURAL SELECTION ; OR , THE SURVIVAL OF THE. X CONTENTS .
Стр. xii
... Increased and Diminished Use of Parts . 156 Reversion as a Factor in the Development of Man Reversion in the Human Family Prepotence in the Transmission of Character Natural Selection in the Development of Man How Man became upright The ...
... Increased and Diminished Use of Parts . 156 Reversion as a Factor in the Development of Man Reversion in the Human Family Prepotence in the Transmission of Character Natural Selection in the Development of Man How Man became upright The ...
Стр. 7
... increased use or disuse of a part , and even from mutilations if followed by disease . We have abundant evidence how susceptible the reproductive system is to changed conditions , in the many instances of animals ren- dered sterile by ...
... increased use or disuse of a part , and even from mutilations if followed by disease . We have abundant evidence how susceptible the reproductive system is to changed conditions , in the many instances of animals ren- dered sterile by ...
Стр. 17
... increase rapidly and tend to supplant the females . We may therefore infer that much more vital force is expended in the pro- duction of ovules and fruit than in the production of pollen . The Differ- ent Forms of Flower , page 345 ...
... increase rapidly and tend to supplant the females . We may therefore infer that much more vital force is expended in the pro- duction of ovules and fruit than in the production of pollen . The Differ- ent Forms of Flower , page 345 ...
Стр. 19
... increase in length and decrease in its thickness , and by the anther opening a little more widely , becomes specially adapted for the very different purpose of self - fertilization , through the combined aid of. THE MOVEMENTS AND HABITS ...
... increase in length and decrease in its thickness , and by the anther opening a little more widely , becomes specially adapted for the very different purpose of self - fertilization , through the combined aid of. THE MOVEMENTS AND HABITS ...
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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