Nomogenesis: Or, Evolution Determined by LawM.I.T. Press, 1969 - Всего страниц: 477 |
Результаты поиска по книге
Результаты 1 – 3 из 26
Стр. 84
... gymnosperms , possess a remarkable combination of gymnosperm and angiosperm ( anthophyte ) characters . To this class , which is practically unknown in the fossil state , 3 belong only three genera - the common Ephedra , the tropical ...
... gymnosperms , possess a remarkable combination of gymnosperm and angiosperm ( anthophyte ) characters . To this class , which is practically unknown in the fossil state , 3 belong only three genera - the common Ephedra , the tropical ...
Стр. 87
... gymnosperms : a typical prothallus with archegonia is formed before fertilisation . Gymnosperms are usually fertilised by the aid of wind , but in Welwitschia the pollen is transferred to the ovule by means of the bug Odontopus ...
... gymnosperms : a typical prothallus with archegonia is formed before fertilisation . Gymnosperms are usually fertilised by the aid of wind , but in Welwitschia the pollen is transferred to the ovule by means of the bug Odontopus ...
Стр. 120
... gymnosperms . " " We may thus trace the entire process of the reduction of the gametophyte , commencing with its flourishing con- dition in mosses , and proceeding with its gradual decline in the Pteridophyta , until we come to its ...
... gymnosperms . " " We may thus trace the entire process of the reduction of the gametophyte , commencing with its flourishing con- dition in mosses , and proceeding with its gradual decline in the Pteridophyta , until we come to its ...
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 | |
Не показаны другие разделы: 30
Другие издания - Просмотреть все
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