The Shipley Collection of Scientific Papers, Volume 331890 - Zoology |
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... determinants " for each intermediate form . Or if he should say that the intermediate forms result from mixtures of the determinants of the two extreme forms , there still remains the further difficulty that natural selection has ...
... determinants " for each intermediate form . Or if he should say that the intermediate forms result from mixtures of the determinants of the two extreme forms , there still remains the further difficulty that natural selection has ...
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... determinants " simul- taneously changed in fit modes . Emphasizing the fact that even a small failure in any one of the co - operative parts may be fatal , as the sprain of an over - taxed muscle shows us , I alleged that the chances ...
... determinants " simul- taneously changed in fit modes . Emphasizing the fact that even a small failure in any one of the co - operative parts may be fatal , as the sprain of an over - taxed muscle shows us , I alleged that the chances ...
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... determinants must co - exist in the same egg . Even now we have not got to the extent of the assumption required . In the address above referred to on " Social Insects from Psychical and Evolutional Points of View , " Professor Riley ...
... determinants must co - exist in the same egg . Even now we have not got to the extent of the assumption required . In the address above referred to on " Social Insects from Psychical and Evolutional Points of View , " Professor Riley ...
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... determinants " for the soldier- form and for the winged sexual form , those " determinants " which had gone a long way towards producing the winged sexual form , would inevitably go on to complete that form , and could not have their ...
... determinants " for the soldier- form and for the winged sexual form , those " determinants " which had gone a long way towards producing the winged sexual form , would inevitably go on to complete that form , and could not have their ...
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... determinants . " He says : - " We have , however , to deal with the transmission of parts which are variable and this necessitates the assumption that just as many independent and variable parts exist in the germ - plasm as are present ...
... determinants . " He says : - " We have , however , to deal with the transmission of parts which are variable and this necessitates the assumption that just as many independent and variable parts exist in the germ - plasm as are present ...
Common terms and phrases
acquired characters Actinozoa adult alimentary Amphioxus Anatomy ancestral Annelid ants appear archenteron assume become blastopore body Burchell's zebra carapace-length cavity changes chromatin cœlom colour connection corpuscles degeneration dentary derived deviation differentiation diploblastic disuse division ectoderm eggs embryo essay evolution excretory existence explanation fact females fibres formation frontal breadth germ germ-plasm growth homologous horse hybrid hypothesis important insects instance instincts larva larvæ legs less males mare mean mesoblast Metazoa modified morphological mouth and anus natural selection nephridia nervous system neural canal nucleus number of glands nutrition observations occur ontogeny organs origin ovum Panmixia Peripatus plants plasm pores pouches present primitive streak principle produced Professor Weismann protoplasm recognised regard reproductive cells result Schwann Sedgwick segmentation nucleus segmented animals somites specialised species Spencer stage structure substance supposed telegony theory tion tissues unicellular variability variations Vertebrata Vertebrate workers yolk zebra
Popular passages
Page 65 - The elementary parts of all tissues are formed of cells in an analogous, though very diversified manner, so that it may be asserted, that there is one universal principle of development for the elementary parts of organisms, however different, and that this principle is the formation of cells.
Page 7 - XVIII. OF THE SCHEMATISME OR TEXTURE OF CORK, AND OF THE CELLS AND PORES OF SOME OTHER SUCH FROTHY BODIES...
Page 72 - PROCESSES, AND COLLATERAL INFORMATION IN THE ARTS, MANUFACTURES, PROFESSIONS, AND TRADES, INCLUDING MEDICINE, PHARMACY, AND DOMESTIC ECONOMY ; designed as a General Book of Reference for the Manufacturer, Tradesman, Amateur, and Heads of Families.