...The creatures presented an organizationhigher than that of polyps, for there was anevident differentiation and complication of parts... 
Henry J. Slack 「Marvels of Pond-life」
...We assume that in theirrespective phyletic lines the differentiation of both S...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Savage (MS) relied on the paleogeographic maps of Lloyd (1963) tohypothesize the extent and centers of differentiation of the Middle AmericanFaunal Element...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...It is not possibleto determine when the genus evolved, but to explain the differentiation ofthe species it is unnecessary to have the ancestral Smilisca present prior to theMiocene...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...To judge by the marked morphologic differentiation of G...
Robert K Selander 「Vertebrates from the Barrier Island of Tamaulipas, México」
...Local differentiation in the pocket gopher (Geomys personatus) insouthern Texas...
Robert K Selander 「Vertebrates from the Barrier Island of Tamaulipas, México」
...Morphological and ecological differentiation of Peromyscus merriamifrom southern Arizona...
J. Knox Jones, Jr. 「Noteworthy Mammals from Sinaloa, Mexico」
...Thesefour barriers presumably have led to the differentiation of the twosubspecies that are newly named beyond...
Sydney Anderson 「Subspeciation in the Meadow Mouse, Microtus montanus, in Wyoming and Colorado」
...This area is themajor area of active differentiation...
Robert L. Packard 「Speciation and Evolution of the Pygmy Mice, Genus Baiomys」
...A secondary area of differentiation is indicatedwithin the range of B...
Robert L. Packard 「Speciation and Evolution of the Pygmy Mice, Genus Baiomys」
...Moy-Thomas(1935:40; 1937:385) realized that the type of scale is a poor criterionfor specific differentiation...
Joan Echols 「A New Genus of Pennsylvania Fish (Crossoperygii, Coelacanthiformes) from Kansas」
...Lacking this faculty, there has been relatively little stimulus to growth, and hence no possibility of differentiation and thus of individualization...
Sidney L. Gulick 「Evolution Of The Japanese, Social And Psychic」
...Frequently this differentiation of the cell-formssets in at a very early stage, during the segmentation-process, and is alreadyvery appreciable in the blastula...
Ernst Haeckel 「The Evolution of Man」
...Theearliest process of inorganic differentiation in the structureless body of theMonera led to its division into two different substances—the caryoplasmand the cytoplasm...
Ernst Haeckel 「The Evolution of Man」
...The effect, then, of this earliest histological differentiation was to producetwo different kinds of cells—nutritive cells in the depression andlocomotive cells on the surface outside...
Ernst Haeckel 「The Evolution of Man」
...We find the first differentiation of epithelial andstinging cells, or of muscular and neural cells, in the thick ectoderm of thehydra...
Ernst Haeckel 「The Evolution of Man」
...260), and which was inherited from them by thereptiles on one side and the mammals on the other, was formed by gradualdegeneration and differentiation from the many-toed fish-fin (Fig...
Ernst Haeckel 「The Evolution of Man」
...This process was the differentiation of the gut into twosections—an anterior respiratory section, the branchial gut, that wasrestricted to breathing, and a posterior digestive section, the hepatic gut...
Ernst Haeckel 「The Evolution of Man」
...The further advance of this contrastbetween the generating cells led to sexual differentiation...
Ernst Haeckel 「The Evolution of Man」
...But such a development of languages isnot differentiation in the sense in which this term is here used, andoften used in biology, but is analogous to multiplication as understoodin biology...
J. W. Powell 「On Limitations To The Use Of Some Anthropologic Data」
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