The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Том 1AMS Press, 1972 - Всего страниц: 479 This is a reproduction of the original artefact. Generally these books are created from careful scans of the original. This allows us to preserve the book accurately and present it in the way the author intended. Since the original versions are generally quite old, there may occasionally be certain imperfections within these reproductions. We're happy to make these classics available again for future generations to enjoy! |
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Стр. 82
... period of life ; and this period in the great majority of cases is an early one . If an animal can in any way protect its own eggs or young , a small number may be produced , and yet the average stock be fully kept up ; but if many eggs ...
... period of life ; and this period in the great majority of cases is an early one . If an animal can in any way protect its own eggs or young , a small number may be produced , and yet the average stock be fully kept up ; but if many eggs ...
Стр. 105
... period of life , tend to reappear in the offspring at the same period ; for instance , in the shape , size , and flavour of the seeds of the many varieties of our culinary and agricultural plants ; in the caterpillar and cocoon stages ...
... period of life , tend to reappear in the offspring at the same period ; for instance , in the shape , size , and flavour of the seeds of the many varieties of our culinary and agricultural plants ; in the caterpillar and cocoon stages ...
Стр. 158
... period the number of species of shells , and that from the middle part of this same period the number of mammals , has not greatly or at all increased . What then checks an indefinite increase in the number of species ? The amount of ...
... period the number of species of shells , and that from the middle part of this same period the number of mammals , has not greatly or at all increased . What then checks an indefinite increase in the number of species ? The amount of ...
Содержание
CHAPTER I | 5 |
VARIATION UNDER NATURE | 51 |
Its bearing on natural selectionThe term used in a wide sense | 75 |
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The Origin of Species by Means of Natural Selection: Or, the Preservation of ... Charles Darwin Недоступно для просмотра - 2016 |
The Origin of Species by Means of Natural Selection: Or the Preservation of ... Charles Darwin Недоступно для просмотра - 2018 |
Часто встречающиеся слова и выражения
acquired adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree developed difficulty distinct species disuse domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important improved increase in number individual differences inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less likewise males manner Melipona Mivart natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species perfect period pigeons pollen pollen-grains present preserved principle probably produced progenitor quadrupeds rank Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion transitional tree variability variations varieties vary widely wings young