Nomogenesis: Or, Evolution Determined by LawM.I.T. Press, 1969 - Всего страниц: 477 |
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Стр. 4
... variations may arise by chance . It may by chance occur that such hereditary variations can in some way become useful to those individuals which they affect . It would be surprising had beneficial variations never arisen ; for it is ...
... variations may arise by chance . It may by chance occur that such hereditary variations can in some way become useful to those individuals which they affect . It would be surprising had beneficial variations never arisen ; for it is ...
Стр. 27
... variations and fluctuations do in effect occur , from such phenotypical material nature cannot build new forms , none of such variations being inherited . For the production of new forms genotypical material , in other words mutations ...
... variations and fluctuations do in effect occur , from such phenotypical material nature cannot build new forms , none of such variations being inherited . For the production of new forms genotypical material , in other words mutations ...
Стр. 37
... variations are not due to the action of natural selection ; they are due to the effects of the geo- graphical environment ( landscape ) ; they are limited to a well - defined area , and are subject , as we shall see , to simul- taneous ...
... variations are not due to the action of natural selection ; they are due to the effects of the geo- graphical environment ( landscape ) ; they are limited to a well - defined area , and are subject , as we shall see , to simul- taneous ...
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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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