Nomogenesis: Or, Evolution Determined by LawM.I.T. Press, 1969 - Всего страниц: 477 |
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Стр. 101
... bones ; scales , if present , have the form of dermal teeth , the jaws consist of Meckel's cartilage and the ... bones " ( in the Lower Devonian Ischnacanthus ) . 66 Finally , a most remarkable resemblance to the Teleo- stomi is ...
... bones ; scales , if present , have the form of dermal teeth , the jaws consist of Meckel's cartilage and the ... bones " ( in the Lower Devonian Ischnacanthus ) . 66 Finally , a most remarkable resemblance to the Teleo- stomi is ...
Стр. 103
... bones in birds the bones , being usually devoid of marrow , are hollow ; through special openings these cavities are penetrated by the diverticula of the air - sacs . Such a peculiarity is directly connected with the power of flight ...
... bones in birds the bones , being usually devoid of marrow , are hollow ; through special openings these cavities are penetrated by the diverticula of the air - sacs . Such a peculiarity is directly connected with the power of flight ...
Стр. 176
... bones were pneumatic , although none of the saurians could fly ; in the Ornithischia , dinosaurs with the pelvis of ... bones of the extremities , but even the vertebrae possessed internal cavities . In the Thero- poda the bones of the ...
... bones were pneumatic , although none of the saurians could fly ; in the Ornithischia , dinosaurs with the pelvis of ... bones of the extremities , but even the vertebrae possessed internal cavities . In the Thero- poda the bones of the ...
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