The Origin of Species: By Means of Natural Selection Or the Preservation of Favoured Races in the Struggle for LifeCastle Books, 2004 - Всего страниц: 703 The instant best-seller and source of controversy of 1859, this classic has lost none of its appeal or importance. A reprint of the original edition, value priced with a new jacket. |
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Стр. 58
... forms ! Amongst animals which unite for each birth , and which are highly locomotive , doubtful forms , ranked by one zoologist as a species and by another as a variety , can rarely be found within the same country , but are common in ...
... forms ! Amongst animals which unite for each birth , and which are highly locomotive , doubtful forms , ranked by one zoologist as a species and by another as a variety , can rarely be found within the same country , but are common in ...
Стр. 212
... forms occur , they are much rarer numerically than the forms which they connect . Now , if we may trust these facts and inferences , and con- clude that varieties linking two other varieties together generally have existed in lesser ...
... forms occur , they are much rarer numerically than the forms which they connect . Now , if we may trust these facts and inferences , and con- clude that varieties linking two other varieties together generally have existed in lesser ...
Стр. 531
... forms having existed in their own homes in greater numbers , and having consequently been advanced through natural selection and competition to a higher stage of perfection , or dominating power , than the southern forms . And thus ...
... forms having existed in their own homes in greater numbers , and having consequently been advanced through natural selection and competition to a higher stage of perfection , or dominating power , than the southern forms . And thus ...
Содержание
CHAPTER I | 5 |
Variability Individual differences Doubtful species Wide | 51 |
STRUGGLE FOR EXISTENCE | 75 |
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Часто встречающиеся слова и выражения
adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continent crossed crustaceans degree developed difficulty distinct species divergence doubt eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs Origin of Species paleozoic parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked remarked resemblance rudimentary seeds slight South America stamens sterility structure successive supposed theory tion trees variability variations varieties vary whilst whole wings young