The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifePenguin Books, 1982 - Всего страниц: 477 |
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Стр. 195
... variations in two or more distinct races . The frequent presence of fourteen or even sixteen tail - feathers in the pouter , may be considered as a variation representing the normal structure of another race , the fantail . I presume ...
... variations in two or more distinct races . The frequent presence of fourteen or even sixteen tail - feathers in the pouter , may be considered as a variation representing the normal structure of another race , the fantail . I presume ...
Стр. 236
... variations of instincts ; that is of variations produced by the same unknown causes which produce slight deviations of bodily structure . - No complex instinct can possibly be produced through natu- ral selection , except by the slow ...
... variations of instincts ; that is of variations produced by the same unknown causes which produce slight deviations of bodily structure . - No complex instinct can possibly be produced through natu- ral selection , except by the slow ...
Стр. 423
... variations can only appear at cor- responding ages , for instance , peculiarities in the caterpillar , cocoon , or imago states of the silk - moth ; or , again , in the horns of almost full - grown cattle . But further than this , ...
... variations can only appear at cor- responding ages , for instance , peculiarities in the caterpillar , cocoon , or imago states of the silk - moth ; or , again , in the horns of almost full - grown cattle . But further than this , ...
Содержание
EDITORS INTRODUCTION | 11 |
NOTE ON THIS EDITION | 49 |
INTRODUCTION | 65 |
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Другие издания - Просмотреть все
The Origin of Species by Means of Natural Selection: Or, The ..., Том 2 Charles Darwin Полный просмотр - 1897 |
The Origin of Species by Means of Natural Selection: Or the Preservation of ... Charles Darwin Ограниченный просмотр - 1982 |
The Origin of Species by Means of Natural Selection: Or, the Preservation of ... Charles Darwin Недоступно для просмотра - 2014 |
Часто встречающиеся слова и выражения
accumulated adapted affinities allied species America ancient animals appear become bees believe birds breeds cause cells chapter characters cirripedes climate closely allied colour continuous crossed crustaceans Darwin degree developed difficulty distinct species domestic doubt eggs embryo Europe existence exterminated extinct extremely facts favourable fertility flowers formation forms fossil genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate larvae less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest offspring organisation organs Origin Origin of Species palaeozoic perfect pigeons pistil plants pollen present principle probably produced progenitor quadrupeds ranked remarked reproductive resemblance rudimentary seeds seems sexual selection Silurian slight South America sterility structure struggle successive supposed tend theory tion trees variability variations varieties vary whole widely wings