%A Prof. Dr. I. C. Baianu %J BULLETIN OF MATHEMATICAL BIOLOGY , DOI: 10.1007/BF02460794 %T Natural Transformations of Organismic Structures %X The mathematical structures underlying the theories of organismic sets, (M, R)-systems and molecular sets are shown to be transformed naturally within the theory of categories and functors. Their natural transformations allow the comparison of distinct entities, as well as the modelling of dynamics in ?organismic? structures. %N 3 %K Categories, supercategories, organisms development and evolution, functors and natural transformations in organismic set theory, (M,R)-systems and molecular set theories %P 431-446 %E Prof.Dr. Nicolas Rashevsky %V 42 %D 1980 %I Pergamon Press, Ltd, reprinted by Springer %L cogprints7755