The Doctrine of Descent and DarwinismD. Appleton, 1875 - 334 من الصفحات |
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الصفحة 11
... infer that , at a definite epoch of refrigeration , life appeared in a natural manner , that is to say , without any incomprehensible act of creation ; and during this slow transformation of the earth's crust , we see living beings also ...
... infer that , at a definite epoch of refrigeration , life appeared in a natural manner , that is to say , without any incomprehensible act of creation ; and during this slow transformation of the earth's crust , we see living beings also ...
الصفحة 69
... infer the existence of coasts , shallow or deep oceanic regions , and a number of geographical conditions on which we see the variety and extent of animal life to be dependent . Besides numerous forms of corals more nearly allied to ...
... infer the existence of coasts , shallow or deep oceanic regions , and a number of geographical conditions on which we see the variety and extent of animal life to be dependent . Besides numerous forms of corals more nearly allied to ...
الصفحة 70
... infer that they also were denizens of coasts . The Molluscs were mainly represented by Brachiopoda and Cephalopoda . However , as Bivalves and Gaster- FIG . 10 . opoda were also in existence , the appearance of this , the most ancient ...
... infer that they also were denizens of coasts . The Molluscs were mainly represented by Brachiopoda and Cephalopoda . However , as Bivalves and Gaster- FIG . 10 . opoda were also in existence , the appearance of this , the most ancient ...
الصفحة 73
... inferred , even from the petrographic cha- racter of the oolitic strata , that this era must have been , on the whole , far more favourable to the development of animal life than the more perturbed Triassic period , or that at least a ...
... inferred , even from the petrographic cha- racter of the oolitic strata , that this era must have been , on the whole , far more favourable to the development of animal life than the more perturbed Triassic period , or that at least a ...
الصفحة 74
... infer with full cer- tainty , a very peculiar construction of the middle portion of the intestinal canal . They possessed a spiral intes- tine like that of the sharks and their congeners . These animals are therefore noteworthy , not ...
... infer with full cer- tainty , a very peculiar construction of the middle portion of the intestinal canal . They possessed a spiral intes- tine like that of the sharks and their congeners . These animals are therefore noteworthy , not ...
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عبارات ومصطلحات مألوفة
according adaptation already Ammonites Amphibians animal world apes appearance Ascidian become birds brain causes Cetacea character characteristics comparative anatomy complete connection continent Darwin dentition derivation diverge doctrine of Descent Echinoderms embryonic Eocene exhibit external facts families fauna fish formation fossil Ganoids Gastrula genera genus geological Goethe grade gradually groups Haeckel heredity higher horse human hypothesis idea individual infer intermediate forms islands lancelet language larva larvæ likewise linguistic Linnæus lower mammals Marsupials Medusa ment merely metamorphosis modifications morphological mutability natural selection observation Oolite organisms origin peculiar pedigree perfect period phase phenomena placenta plants polypes possess present primordial progenitors races relations remains reproduction reptiles resemblance Rütimeyer says scarcely scientific separate sexual Silurian skull species sponges strata structure systematic terrestrial animals Tertiary theory of selection tion transformation transition true Ungulata Ungulates varieties vegetal vertebral column Vertebrata vertebrate animals whole
مقاطع مشهورة
الصفحة 162 - 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.18 Darwin always knew that his views would be controversial. A few days before The Origin of Species appeared, Darwin wrote, in a letter to Wallace, 'God knows what...
الصفحة 160 - I had not formerly sufficiently considered the existence of many structures which appear to be, as far as we can judge, neither beneficial nor injurious ; and this I believe to be one of the greatest oversights as yet detected in my work.
الصفحة 160 - Na'geli on plants, and the remarks by various authors with respect to animals, more especially those recently made by Professor Broca, that in the earlier editions of my Origin of Species I perhaps attributed too much to the action of natural selection or the survival of the fittest.