Nomogenesis: Or, Evolution Determined by LawM.I.T. Press, 1969 - Всего страниц: 477 |
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Стр. 150
... directions . " A whale does not tend to vary in the direction of producing feathers , nor a bird in the direction of developing whale - bone . " If that be the case , if the tendency towards variation be predetermined , if the ...
... directions . " A whale does not tend to vary in the direction of producing feathers , nor a bird in the direction of developing whale - bone . " If that be the case , if the tendency towards variation be predetermined , if the ...
Стр. 151
... direction of evolution from this cause can hardly have experienced a considerable change , for a definite direction in the evolution of ammonites and dinosaurs lasted for millions , possibly tens of millions of years , during which ...
... direction of evolution from this cause can hardly have experienced a considerable change , for a definite direction in the evolution of ammonites and dinosaurs lasted for millions , possibly tens of millions of years , during which ...
Стр. 164
... direction of ter- restrial vertebrates ; but the Tetrapoda have never been derived from the Selachii . The Palaeozoic club - mosses obviously develop in the direction of the higher gymnosperms . Bennettitales , Meso- zoic gymnosperms ...
... direction of ter- restrial vertebrates ; but the Tetrapoda have never been derived from the Selachii . The Palaeozoic club - mosses obviously develop in the direction of the higher gymnosperms . Bennettitales , Meso- zoic gymnosperms ...
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 |
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Часто встречающиеся слова и выражения
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