The Doctrine of Descent and DarwinismD. Appleton, 1875 - 334 páginas |
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Página 25
... character , and in many groups of lower beings , which Haeckel has recently comprised under the name Protista , we see the pro- cesses of metamorphosis of tissue , nutrition , and repro- duction taking place , indeed , but in a manner ...
... character , and in many groups of lower beings , which Haeckel has recently comprised under the name Protista , we see the pro- cesses of metamorphosis of tissue , nutrition , and repro- duction taking place , indeed , but in a manner ...
Página 26
... character- istics of the whole . The conception of an organism as a being composed of various parts , with various offices or functions , and appearing under a definite form gradually developed , is in our day so inherent and intuitive ...
... character- istics of the whole . The conception of an organism as a being composed of various parts , with various offices or functions , and appearing under a definite form gradually developed , is in our day so inherent and intuitive ...
Página 27
... character of a higher com- plexity and development , by the differentiation of the originally homogeneous substance into various morpho- logical structures and organs . As we shall have another opportunity of expressing an opinion in ...
... character of a higher com- plexity and development , by the differentiation of the originally homogeneous substance into various morpho- logical structures and organs . As we shall have another opportunity of expressing an opinion in ...
Página 29
... character , general and special . In other words , the position of an animal in the system is defined , first , by the general attributes , which it has in common with the forms harmonizing with it in the main characters of their ...
... character , general and special . In other words , the position of an animal in the system is defined , first , by the general attributes , which it has in common with the forms harmonizing with it in the main characters of their ...
Página 32
... character , so variegated is the host of smaller scattered groups , and even of single species , which demand admittance to the system of the Vermes . If we attempt to describe their typical nature in a few words , it must be something ...
... character , so variegated is the host of smaller scattered groups , and even of single species , which demand admittance to the system of the Vermes . If we attempt to describe their typical nature in a few words , it must be something ...
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Palavras e frases frequentes
according adaptation already Ammonites Amphibians animal world apes appearance Ascidian birds body bone brain causes Cetacea character characteristics comparative anatomy complete connection continent Darwin dentition derivation diverge doctrine of Descent Echinoderms embryo Eocene exhibit existence external facts families fauna fish formation fossil Gastrula gemmules genera genus geological Goethe grade gradually groups Haeckel heredity higher horse human hypothesis idea individual infer intermediate forms investigation islands lancelet language larva larvæ likewise linguistic lower mammals Marsupials Medusa ment merely metamorphosis modifications morphological mutability natural selection observations Oolite organisms origin ovum peculiar pedigree perfect period phase phenomena placenta plants polypes possess present primordial progenitors races regard relations remains reproduction reptiles Rütimeyer says scarcely scientific separate sexual Silurian skull species strata structure systematic terrestrial animals theory of selection tion transformation true Ungulata Ungulates varieties vertebral column Vertebrata vertebrate animals whole