Nomogenesis: Or, Evolution Determined by LawM.I.T. Press, 1969 - Всего страниц: 477 |
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Стр. 135
... fins of this fish while in the air acted as parachutes . Owing to repeated use these fins became more and more adapted for flight.1 In much the same manner , according to Abel , has been developed the faculty of flight in the pelagic ...
... fins of this fish while in the air acted as parachutes . Owing to repeated use these fins became more and more adapted for flight.1 In much the same manner , according to Abel , has been developed the faculty of flight in the pelagic ...
Стр. 136
... fins , while in the sloping descent it does not . The number of vibrations of the fins he estimates at 10-30 a second ( p . 372 ) , the distance flown by the fish at about 400 metres . Dahl ( 1891 ) , while not denying the accuracy of ...
... fins , while in the sloping descent it does not . The number of vibrations of the fins he estimates at 10-30 a second ( p . 372 ) , the distance flown by the fish at about 400 metres . Dahl ( 1891 ) , while not denying the accuracy of ...
Стр. 139
... fins may " fly , " there is nothing surprising in the fact that a fish possessing such a parachute as is represented by the fins , say , of Exo- coetus , is capable of remaining a considerable time in the air . What may be the purpose ...
... fins may " fly , " there is nothing surprising in the fact that a fish possessing such a parachute as is represented by the fins , say , of Exo- coetus , is capable of remaining a considerable time in the air . What may be the purpose ...
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