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  1. Some Viewpoints on the Origin and Evolution of Flowering Plants.E. E. Leppik - 1955 - Acta Biotheoretica 11 (2):45-56.
    Some recent trends of modern biology, which seem to have a most consequential influence to the further treatment of the problem of the origin and evolution of flowering plants, are shortly reviewed in this article.Several new discoveries and observations about pollinating insects revealed to some extent the mystery of the evolution of flower types. The deciphering of the definite signs and codes of communication among social insects and the interpretation of a well developed sign language of bees belong to the (...)
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