Boreskov

irth of true biology [4]. Studies of the origin of life within the GLO framework are closelyrelated to practical objectives of astrobiology, since the probability of finding extraterrestriallife forms grows with the widening of the range of search, which is determined by theconcept of life and its manifestations [3,11].Possible approach to creating a general definition of life can be based on selecting someproperty (or properties) which is/are inherent only to living beings. However it seems naturalthat developed (“mature”) life can have another dominant property than life during theformation period. Really it is possible to suggest some necessary (supporting existence itself)property which is inherent to initial probiont system –a precursor of living beings – and someproperty, which is as an attractor where the vector of living beings phylogenesis andontogenesis are directed. The first one is ability to autocatalysis, which later transforms anddivided into self‐maintenance and self‐reproduction. Second one is ability to make choice onthe base of signal perception, or in other terms – information processing [1]. Namelyinformation processing is immanent and specific property of living beings among othernatural objects. It has to be emphasized that we consider only natural objects, and artificialones can not be included in our consideration since they are created by living, and more,intelligent beings and “bear the prints of life”.The principle of graduality has to be satisfied over all stages of chemical evolution,transient to biological evolution, and biological evolution itself. In the paper key steps ofchemical evolution from beginin to the transient period are discussed. The hypotheses of themultivariate oligomeric autocatalytic system is suggested as possible scenario of chemicalevolution [2] and transforming dominant property of life during it.References:[1]. Bartsev, S.I. Essence of life and multiformity of its realization: expected signatures of life, Adv. Space Res.2004, 33 (8), 1313‐1317.[2]. Bartsev S.I., Mezhevikin V.V. On initial steps of chemical prebiotic evolution: triggering autocatalyticreaction of oligomerization. Adv. Space Res.‐ 2008. 42 (12), 2008‐2013.[3]. Benner S.A., Ricardo A., Carrigan M.A. Is there a common chemical model for life in the universe? CurrentOpinion in Chemical Biology 2004, 8:672–689.[4]. Bernal J.D., Molecular structure, biochemical function and evolution. In the book “Theoretical andmathematical biology”. Ed. T.H.Waterman and H.J.Morowitz. Yale University. Blaisdell PublishingCompany, New York Toronto, London 1965.[5]. Cornish‐Bowden A., Cardenas M.L. Bringing Chemistry to Life: What does it Mean to be Alive? Bozen 2006,May 15th – 19th, 2006, Bozen, Italy Published: 5th November 2007.[6]. Eigen, M. What will endure of 20th century biology? In What is life? The next fifty Years; Murphy, M.P.,O'Neill, L.A.J., Eds.; Cambridge University Press: Cambridge, UK, 1995; pp. 5‐23.[7]. Haldane, J.B.S. What is life; Lindsay Drummond: London, UK, 1949, p. 261.108