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Polyvalence or polyvalent may refer to: . Polyvalency (chemistry), chemical species, generally atoms or molecules, which exhibit more than one chemical valence Polyvalence (music), the musical use of more than one harmonic function of a tonality simultaneously
Fig. 1. Electron sharing in multivalent atomic binding. The dots and crosses represent the outer electrons of the two different species in each molecule.
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In 1973, M. J. D. White, then at the end of a long career investigating karyotypes, gave an interesting summary of the distribution of chromosome polymorphism. "It is extremely difficult to get an adequate idea as to what fraction of the species of eukaryote organisms actually are polymorphic for structural rearrangements of the chromosomes.
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cattalo, from cattle and buffalo [2]; donkra, from donkey and zebra (progeny of donkey stallion and zebra mare) cf. zedonk below; llamanaco, from llama and guanaco [3]; wholphin, from whale and dolphin [2]
Originally conceived under the proposed name of Villa Nova, PCHS opened as Polyvalente de Pierrefonds Comprehensive High School, to better reflect its multi-disciplined approach. In 1979 it ceded half its population when French speaking students moved to the new Polyvalente des Sources high school, located nearby. PCHS remained a Catholic ...