Life on the Earth: Its Origin and SuccessionMacmillan and Company, 1860 - Всего страниц: 224 |
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Стр. 5
... according to this actual plan of creation , the only one we are acquainted with , or can justly 1 In modern language matter is said to be known to us only by effects cognizable by our senses ; these effects are due to forces ; matter is ...
... according to this actual plan of creation , the only one we are acquainted with , or can justly 1 In modern language matter is said to be known to us only by effects cognizable by our senses ; these effects are due to forces ; matter is ...
Стр. 12
... According to an esti- mate of some date , if we count in the warm zones of Asia the plants which range northwards from the equator with a temperature of 80 ° , so as to reach the latitude where the annual mean temperature of 64 ...
... According to an esti- mate of some date , if we count in the warm zones of Asia the plants which range northwards from the equator with a temperature of 80 ° , so as to reach the latitude where the annual mean temperature of 64 ...
Стр. 13
... according to elevation - 1000 to 2000 ft . , 2000 to 3000 ft . and 3000 to 4000 ft . above the sea . The num- bers are : - 273 species - 183 species - 85 species 48 orders - 38 orders - 25 orders , shewing clearly the reduction of ...
... according to elevation - 1000 to 2000 ft . , 2000 to 3000 ft . and 3000 to 4000 ft . above the sea . The num- bers are : - 273 species - 183 species - 85 species 48 orders - 38 orders - 25 orders , shewing clearly the reduction of ...
Стр. 25
... according to their prevalent structures and qualities — to place them in such relations to each other as they really have to represent , in short , the plan of these parts of creation — according to the leading ideas of which it is , or ...
... according to their prevalent structures and qualities — to place them in such relations to each other as they really have to represent , in short , the plan of these parts of creation — according to the leading ideas of which it is , or ...
Стр. 28
... according as the nutritive and reproductive systems are more surely analysed by the microscope . Under the great types of vegetable and animal structure which have been mentioned , naturalists find it convenient to adopt many classes ...
... according as the nutritive and reproductive systems are more surely analysed by the microscope . Under the great types of vegetable and animal structure which have been mentioned , naturalists find it convenient to adopt many classes ...
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affinity ages Ammonites Amorphozoa ancient Annelida appear atmosphere beds Brachiopoda British BROOKE FOSS WESTCOTT Carbon Carboniferous Cenozoic Cenozoic Strata Cephalopoda Cetacea Chalk classes Clay climate cloth creation Cretaceous Crocodilia Crown 8vo Crustacea deposits Dimyaria distribution earlier earliest earth Echinodermata effect English epoch equal examples existing Fcap Fishes forms fossil freshwater Gasteropoda genera genus geological gilt leaves globe Goniatites groups heat History hypothesis Insects land Lias limestone limited Lingula living Llandeilo Mammalia marine mean temperature Mesozoic Mesozoic Period modern Oceans Mollusca Monomyaria naturalists nature number of species occur Oolitic organic origin Paleozoic Paleozoic Strata perhaps phenomena plants and animals Polyzoa prevalent Professor races recent regard remarkable Reptiles rivers rocks Royal 16mo Second Edition sediments Sermons shells shew Silurian Stonesfield Strata structure succession suppose surface Teleosaurus thickness tion traced University of Cambridge Upper variations vegetable whole zone Zoophyta وو
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Стр. 202 - As all the living forms of life are the lineal descendants of those which lived long before the Cambrian epoch, we may feel certain that the ordinary succession by generation has never once been broken, and that no cataclysm has desolated the whole world.
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Стр. 203 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
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Стр. 202 - Therefore I should infer from analogy that probably all the organic beings which have ever lived on this earth, have descended from some one primordial form, into which life was first breathed.
Стр. 201 - I formerly entertained, namely, that each species has been independently created, is erroneous. I am fully convinced that species are not immutable; but that those belonging to what are called the same genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of any one species are the descendants of that species. Furthermore, I am convinced that Natural Selection has been the main, but not exclusive, means of modification.
Стр. 201 - I cannot doubt that the theory of descent with modification embraces all the members of the same great class or kingdom. I believe that animals are descended from at most only four or five progenitors, and plants from an equal or lesser number.
Стр. 203 - It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth...
Стр. 186 - The intermixture of distinct species is guarded against by the aversion of the individuals composing them to sexual union, or by the sterility of the mule offspring. It does not appear that true hybrid races have ever been perpetuated for several generations, even by the assistance of man; for the cases usually cited relate to the crossing of mules with individuals of pure species, and not to the intermixture of hybrid with hybrid.