The Doctrine of Descent and DarwinismD. Appleton, 1875 - 334 páginas |
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Página 22
... similar , though far weaker and imperceptible to us , did not occur in the elements , that is to say , in the atoms . If we only con- sider that we are as little capable of knowing that the falling stone feels nothing , as that it does ...
... similar , though far weaker and imperceptible to us , did not occur in the elements , that is to say , in the atoms . If we only con- sider that we are as little capable of knowing that the falling stone feels nothing , as that it does ...
Página 26
... similar beings are the simplest organisms devoid of organs . While ac- centuating the limits of research as restricted by inade- quate means of observation , we maintain the validity of Rollet's retort , ' that ' our reason cannot ...
... similar beings are the simplest organisms devoid of organs . While ac- centuating the limits of research as restricted by inade- quate means of observation , we maintain the validity of Rollet's retort , ' that ' our reason cannot ...
Página 28
... similar construction , and varying in number from four to six . The surface of the body is studded with numerous little stinging vesicles , which by their contact stun any smaller animalculæ straying within the reach of the polype , and ...
... similar construction , and varying in number from four to six . The surface of the body is studded with numerous little stinging vesicles , which by their contact stun any smaller animalculæ straying within the reach of the polype , and ...
Página 41
... part , and yet being able to transfer to the progeny its own characteristics in their full integrity . The simplest case of gemmation is where the parent animal produces one or more gemmules similar to itself , FISSION - ĠEMMATION . 4I.
... part , and yet being able to transfer to the progeny its own characteristics in their full integrity . The simplest case of gemmation is where the parent animal produces one or more gemmules similar to itself , FISSION - ĠEMMATION . 4I.
Página 42
Dr. Schmidt (Eduard Oskar). animal produces one or more gemmules similar to itself , capable in their turn of producing similar gemmules . Of this , every collection of corals gives numerous examples , and shows how the diversified ...
Dr. Schmidt (Eduard Oskar). animal produces one or more gemmules similar to itself , capable in their turn of producing similar gemmules . Of this , every collection of corals gives numerous examples , and shows how the diversified ...
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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