The Doctrine of Descent and DarwinismD. Appleton, 1875 - 334 من الصفحات |
من داخل الكتاب
النتائج 1-5 من 67
الصفحة 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 ...
الصفحة 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 ...
الصفحة 27
... character of a higher cóm- 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 cóm- 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 ...
الصفحة 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 ...
الصفحة 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 ...
طبعات أخرى - عرض جميع المقتطفات
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.