Nomogenesis: Or, Evolution Determined by LawM.I.T. Press, 1969 - Всего страниц: 477 |
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Стр. 73
... characters , or phylogenetic acceleration . By the term precession of characters we understand the following series of phenomena : ( 1 ) Palaeontology teaches us that in young forms characters not infrequently occur which , while ...
... characters , or phylogenetic acceleration . By the term precession of characters we understand the following series of phenomena : ( 1 ) Palaeontology teaches us that in young forms characters not infrequently occur which , while ...
Стр. 235
... characters is purely conventional . Are teeth , for instance , external or internal characters ? Or are gills ? Alluding to the question of convergence ( isomorphy ) in birds , Gadow , in his fundamental work on that class of ...
... characters is purely conventional . Are teeth , for instance , external or internal characters ? Or are gills ? Alluding to the question of convergence ( isomorphy ) in birds , Gadow , in his fundamental work on that class of ...
Стр. 403
... characters by which highly organised groups are distinguished appear in the shape of rudiments very much earlier in lowly constituted groups . Hence it may be seen that evolution is to a considerable degree predetermined , that it is in ...
... characters by which highly organised groups are distinguished appear in the shape of rudiments very much earlier in lowly constituted groups . Hence it may be seen that evolution is to a considerable degree predetermined , that it is in ...
Содержание
THE STRUGGLE FOR EXISTENCE AND NATURAL | 1 |
Various types of the struggle for existence | 45 |
Is survival a privilege of the bearers of useful | 62 |
Авторские права | |
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Abel accidental according adapted adult allied America ammonites amphibians ancestors angiosperms Animals and Plants appear belonging Bennettitales birds bones butterflies Carinatae chance chap characters colour common complex Craniata Cretaceous Crossopterygii Darwin definite direction derived determined direction dicotyledons dinosaurs Dipnoi dorsal due to convergence embryo evolution exhibit external extinct female fins fishes formation forms Fürbringer genera genus groups gymnosperms hind-limbs independently insects instance Kuznetzov lamarckiana latter living Lotsy lower male mammals manifested means mimicry Monochlamydeae monocotyledons mutations natural selection number of individuals observed occur ontogeny opinion organisation Origin of Species Ornithischia orthogenesis Osborn parallel pectoral peculiar phenomena phylogeny Piperales placenta Placentalia Polycarpicae polyphyletic polyphyletic origin possess primitive produced Pseudosuchia pterosaurs Ratitae referred regarded remarkable reptiles resemblance Russian Saurischia says seeds shell similar skull structure struggle for existence sub-species teeth Teleostomi tendency tetrapods theory tion transformation varieties Vavilov vertebrates Vries wings