The Law of Heredity: A Study of the Cause of Variation, and the Origin of Living OrganismsJ. Murphy, 1883 - 336페이지 |
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10 페이지
... ancestor . The power to revert to this ancestral form is handed down from generation to generation in the egg , and it may show itself at any time by the production of a striped colt . Reversion is , in a certain sense , exception- al ...
... ancestor . The power to revert to this ancestral form is handed down from generation to generation in the egg , and it may show itself at any time by the production of a striped colt . Reversion is , in a certain sense , exception- al ...
29 페이지
... ancestry of any organ- ism would lead us back through simpler and simpler forms to a remote unspecialized unicellular ancestral form . It is unnecessary to review in this place the evi- dence for this conclusion , for the fact that it ...
... ancestry of any organ- ism would lead us back through simpler and simpler forms to a remote unspecialized unicellular ancestral form . It is unnecessary to review in this place the evi- dence for this conclusion , for the fact that it ...
30 페이지
... ancestral rhi- zopod , and since the ovum of a horse is homologous with a rhizopod , or is morphologically ... form which the germ passes through under our eyes in a short time are , by the law of inher- itance , a condensed and shortened ...
... ancestral rhi- zopod , and since the ovum of a horse is homologous with a rhizopod , or is morphologically ... form which the germ passes through under our eyes in a short time are , by the law of inher- itance , a condensed and shortened ...
35 페이지
... ancestral form . This community of descent unites all the forms of a class , an order , and so on . Since each class is di- vided into various orders , each order into several families , each family again into various genera , each ...
... ancestral form . This community of descent unites all the forms of a class , an order , and so on . Since each class is di- vided into various orders , each order into several families , each family again into various genera , each ...
36 페이지
... ancestral species to the entire group of species , and in the other case from the ances- tral cell to the entire group of cells , assumes in both cases the same form of a branching wave - motion . Any one who accepts the fundamental law ...
... ancestral species to the entire group of species , and in the other case from the ances- tral cell to the entire group of cells , assumes in both cases the same form of a branching wave - motion . Any one who accepts the fundamental law ...
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acquired action adult alike allied species ancestor ancestral form asexual asexual reproduction become birds body breed characteristics color common conclusion confined crossing crustacea Daphnia Darwin Darwin says descendants domesticated animals domesticated pigeons embryo epigenesis evolution existence experience explanation fact female fertilized fortuitous fowls functions furnishes gemmules genera genus germ germinative vesicle give rise gradually greatly hereditary homology horns hybrid hydroids hypothesis individual influence inherited insects latent male cell male element males of allied medusa ment modification natural selection offspring ordinary origin origin of species ovum pangenesis parent parthenogenesis peculiarities perfect phenomena plants plastidules plumage present produced pure race reasons for believing reciprocal crosses reproductive elements resemblance result secondary sexual characters sexes sexual elements sexual reproduction sexual selection similar simply striped structure tendency to vary theory of heredity throw off gemmules tion transmission transmit true variable various young