Organism as a wholePutnam, 1916 - 379 pages |
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Page 11
... positive heliotropism— are found in organisms that never by any chance make use of them ; and later that a great many organisms show definite instinctive reactions towards a galvanic current galvanotropism — although no organism has ...
... positive heliotropism— are found in organisms that never by any chance make use of them ; and later that a great many organisms show definite instinctive reactions towards a galvanic current galvanotropism — although no organism has ...
Page 70
... positive results which Taylor observed after injection of the sperm might have been due to the proteins contained in the tail of the spermatozoa , which in certain animals at least does not enter the egg and hence can have no influence ...
... positive results which Taylor observed after injection of the sperm might have been due to the proteins contained in the tail of the spermatozoa , which in certain animals at least does not enter the egg and hence can have no influence ...
Page 92
... positive chemotropism of the spermatozoa toward an egg of the same species has been demon- strated in a few cases , but it seems that this pheno- menon is not determined by that type of substances which give rise to species specificity ...
... positive chemotropism of the spermatozoa toward an egg of the same species has been demon- strated in a few cases , but it seems that this pheno- menon is not determined by that type of substances which give rise to species specificity ...
Page 93
... positive chemotropism of spermatozoa to eggs of the same species . Lillie claims to have proved a positive chemotropism of the sperm of sea urchins to " fertilizin , " but such a conclusion is only justified if a method similar to that ...
... positive chemotropism of spermatozoa to eggs of the same species . Lillie claims to have proved a positive chemotropism of the sperm of sea urchins to " fertilizin , " but such a conclusion is only justified if a method similar to that ...
Page 241
... positive conception as to the mode in which it is exerted . Morgan has given an ingenious explanation of these deviations on the basis of the chromosome theory of Mendelian heredity . He assumes that they occur in those cases where the ...
... positive conception as to the mode in which it is exerted . Morgan has given an ingenious explanation of these deviations on the basis of the chromosome theory of Mendelian heredity . He assumes that they occur in those cases where the ...
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Common terms and phrases
agglutination animals annelids Arbacia Arch artificial membrane artificial parthenogenesis assumption bacteria Biol blastomeres blood body butyric acid cell division chapter characters chemical chromosome concentration contained cortical layer cytolysis definite determined digestion disintegration Driesch effect egg of purpuratus embryo enter the egg Entwcklngsmech enzyme existence experiments eyes f. d. ges fact female fertilized fish foreign species franciscanus frog Fundulus genus give rise graft groups grow growth heliotropic hemoglobin heredity hermaphroditic hybrids hypertonic solution idea induce Jour lack of oxygen large number larvæ latter light Lillie lipoids living matter Loeb male Mendelian heredity normal sea water nucleus observed ovaries oxidations parthenogenesis permeability phenomena phenomenon physicochemical Physiol pigment plants polyp positively heliotropic possible produced proteins protoplasm pure reaction regeneration result rôle salts sea urchin sea water sea-urchin egg segment serum shown sperm spermatozoön spermatozoön enters starfish Strongylocentrotus substances synthesis theory tion tissue transplanted unfertilized egg Wasteneys X chromosome