Life on the Earth: Its Origin and SuccessionMacmillan and Company, 1860 - Всего страниц: 224 |
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Стр. 7
... growth , not only by high temperature and humid atmosphere , but by a greater proportion of carbonic acid in the air . Dr Daubeny has submitted this to a trial , in vessels properly supplied with a regu- lated artificial atmosphere ...
... growth , not only by high temperature and humid atmosphere , but by a greater proportion of carbonic acid in the air . Dr Daubeny has submitted this to a trial , in vessels properly supplied with a regu- lated artificial atmosphere ...
Стр. 10
... growth , decay and death , in the individual - always the same course of renewal by offspring , after a definite mode which varies with the different kinds of living beings . One of these modes seems to deserve separation from the rest ...
... growth , decay and death , in the individual - always the same course of renewal by offspring , after a definite mode which varies with the different kinds of living beings . One of these modes seems to deserve separation from the rest ...
Стр. 27
... growth outward , leaves reticu- lated , symmetry quinary or quaternary ( as Ranunculacea , Rosacea , Labiata , Conifera ) . 2. Monocotyledones . Em- bryo with one seed - lobe , stem growth internal , leaves usually with parallel veins ...
... growth outward , leaves reticu- lated , symmetry quinary or quaternary ( as Ranunculacea , Rosacea , Labiata , Conifera ) . 2. Monocotyledones . Em- bryo with one seed - lobe , stem growth internal , leaves usually with parallel veins ...
Стр. 90
... growth and membranous or stony parts much resembling Zoo- phyta , occur in all the groups of Strata , and except- ing Reteporidæ , which are almost confined to Palæo- NEOZOIC . ANNELIDA . ( Cephalobranchiata . Dorsibranchiata ...
... growth and membranous or stony parts much resembling Zoo- phyta , occur in all the groups of Strata , and except- ing Reteporidæ , which are almost confined to Palæo- NEOZOIC . ANNELIDA . ( Cephalobranchiata . Dorsibranchiata ...
Стр. 95
... growth , a thin tumid oblong shell , prominent beaks , gaping posterior end , ob- scure hinge - teeth . The recent species differs but slightly from fossils which might be selected from the Oolites LIFE ON THE EARTH . 95.
... growth , a thin tumid oblong shell , prominent beaks , gaping posterior end , ob- scure hinge - teeth . The recent species differs but slightly from fossils which might be selected from the Oolites LIFE ON THE EARTH . 95.
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Часто встречающиеся слова и выражения
according ages ancient animals appear atmosphere Author beds Book British Cenozoic character classes climate cloth Coal coast collected compared considerable continual Crown 8vo Crustacea currents deposits direction distribution earlier earth Edition effect equal evidence example existing fact families feet Fishes force forms fossil genera geological gives globe greater groups growth heat History hypothesis idea indicated influence kind known land laws less limited living marine mass mean measure Mesozoic Mollusca nature nearly observed occur ocean Oolitic organic origin Paleozoic perhaps period plants plants and animals Pleistocene present probably produced proportion races recent regard regions remains remarkable represented require result rivers rocks Second sediments shells similar space species Strata structure successive suppose surface temperature Tertiary thickness tion traced University Upper variations variety waste whole zone
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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. 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.