Organism as a wholePutnam, 1916 - 379 pages |
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Page vi
... sperm- atozoon develop into an organism without the cyto- plasm of an egg , although sperm and egg nucleus transmit equally the Mendelian characters . The con- ception that the cytoplasm of the egg is already the embryo in the rough may ...
... sperm- atozoon develop into an organism without the cyto- plasm of an egg , although sperm and egg nucleus transmit equally the Mendelian characters . The con- ception that the cytoplasm of the egg is already the embryo in the rough may ...
Page 10
... sperm and eggs are brought together ; or those by which the young are prevented from starvation to realize the apparently desperate problems in store for a mechanist , to whom the assumption of design is meaningless . And yet we are ...
... sperm and eggs are brought together ; or those by which the young are prevented from starvation to realize the apparently desperate problems in store for a mechanist , to whom the assumption of design is meaningless . And yet we are ...
Page 48
... sperm of starfish in normal sea water , will lose their specificity towards this type of foreign sperm if the sea water is rendered a little more alkaline , or if a little more Ca is added to the sea water , or if both these variations ...
... sperm of starfish in normal sea water , will lose their specificity towards this type of foreign sperm if the sea water is rendered a little more alkaline , or if a little more Ca is added to the sea water , or if both these variations ...
Page 49
... sperm had contributed no he- AAA FIG . 2. Five - days - old larvæ of Strongylocentrotus purpur- atus produced by artificial parthenogenesis . ( Side view . ) The larvæ in Figs . 1 and 2 are identical in appearance , proving that ...
... sperm had contributed no he- AAA FIG . 2. Five - days - old larvæ of Strongylocentrotus purpur- atus produced by artificial parthenogenesis . ( Side view . ) The larvæ in Figs . 1 and 2 are identical in appearance , proving that ...
Page 50
... sperm develop at first perfectly normally they begin to die in large numbers on the second and third day of their development , and only a very small number live long enough to form a skeleton ; and these are usually sickly and form the ...
... sperm develop at first perfectly normally they begin to die in large numbers on the second and third day of their development , and only a very small number live long enough to form a skeleton ; and these are usually sickly and form 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