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The Struggle for Existence and Natural
On the simplicity of theories
The improbability of selectionism
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accidental according adapted adult allied America ammonites ancestors angiosperms Animals and Plants appear belonging Bennettitales Berg birds bones butterflies cephalic index chance chap characters colour common complex convergence Crossopterygii Darwin definite derived determined direction dicotyledons dinosaurs Dipnoi dorsal embryo evolution exhibit external extinct female fins fishes flax flowers formation forms Furbringer genera genus geographical landscape Gnetales groups gymnosperms hybrids independently inhabiting insects instance Kuznetzov lamarckiana latter linicola living Lotsy male mammals manifested manner means mimicry monocotyledons mutations natural selection nomogenesis number of individuals observed occur ontogeny opinion organisation Origin of Species Ornithischia Osborn parallel peculiar phylogeny Piperales Polycarpicae polyphyletic polyphyletic origin possess primitive produced Pseudosuchia pterosaurs Ratitae regarded remarkable reptiles resemblance Russian Saurischia says seeds shell similar skull structure struggle for existence sub-species teeth Teleostomi tendency Tetrapoda theory tion transformation Variation of Animals varieties Vavilov vertebrates Vries