Science, Volumen51John Michels (Journalist) American Association for the Advancement of Science, 1920 Since Jan. 1901 the official proceedings and most of the papers of the American Association for the Advancement of Science have been included in Science. |
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Página 68
... species of plants and animals can grow . V. Ecological differentiation in plants and ani- mals , structural and functional . ( a ) Ecological differentiation in single spe- cies . ( b ) Growth forms and regional distribution . Frequency ...
... species of plants and animals can grow . V. Ecological differentiation in plants and ani- mals , structural and functional . ( a ) Ecological differentiation in single spe- cies . ( b ) Growth forms and regional distribution . Frequency ...
Página 73
... species . When he died in 1910 , his ex- tensive and valuable collection of living birds was saved through the devotion and sacrifices , both personal and financial , of Dr. Oscar Riddle , the editor of these posthumous volumes . After ...
... species . When he died in 1910 , his ex- tensive and valuable collection of living birds was saved through the devotion and sacrifices , both personal and financial , of Dr. Oscar Riddle , the editor of these posthumous volumes . After ...
Página 74
... species and its characters . " " It is true a great amount of work on Mendelian heredity seems strongly to support the unit - character hypothesis , and that cytol- ogy offers some further support . Neverthe- less , I have to confess a ...
... species and its characters . " " It is true a great amount of work on Mendelian heredity seems strongly to support the unit - character hypothesis , and that cytol- ogy offers some further support . Neverthe- less , I have to confess a ...
Página 75
... species gravitating slowly in one or a few directions ? And if we find large groups of species all affected by a like variation , moving in the same direction , are we compelled to regard such a definite variation - tendency ' as teleo ...
... species gravitating slowly in one or a few directions ? And if we find large groups of species all affected by a like variation , moving in the same direction , are we compelled to regard such a definite variation - tendency ' as teleo ...
Página 76
... species , it follows , on Whitman's view , that some internal agency has brought about these parallel advances . The change at molting that transforms the young plumage into that of the adult is often abrupt , almost like a mutation ...
... species , it follows , on Whitman's view , that some internal agency has brought about these parallel advances . The change at molting that transforms the young plumage into that of the adult is often abrupt , almost like a mutation ...
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