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. 461
... extinction . So little is this subject under- stood , that I have heard surprise repeatedly expressed at such great monsters as the Mastodon and the more ancient Dinosaurians having become extinct ; as if mere bodily strength gave ...
... extinction . So little is this subject under- stood , that I have heard surprise repeatedly expressed at such great monsters as the Mastodon and the more ancient Dinosaurians having become extinct ; as if mere bodily strength gave ...
Стр. 471
... extinct species can all be classed either in still existing groups , or between them . That the extinct forms of life help to fill up the intervals between existing genera , families , and orders , is certainly true ; but as this ...
... extinct species can all be classed either in still existing groups , or between them . That the extinct forms of life help to fill up the intervals between existing genera , families , and orders , is certainly true ; but as this ...
Стр. 474
... extinct . The three existing genera a1a , q1 , p1 , will form a small family ; b1 and f1 a closely allied family or sub - family ; and o1 , el , m1 , a third family . These ... extinction and 474 [ CHAP . XI . AFFINITIES OF EXTINCT SPECIES .
... extinct . The three existing genera a1a , q1 , p1 , will form a small family ; b1 and f1 a closely allied family or sub - family ; and o1 , el , m1 , a third family . These ... extinction and 474 [ CHAP . XI . AFFINITIES OF EXTINCT SPECIES .
Содержание
CHAPTER I | 5 |
Variability Individual differences Doubtful species Wide | 51 |
STRUGGLE FOR EXISTENCE | 75 |
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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