By Dana Bell
Air strength colours Vol 1: 1926-42
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The results reviewed herein represent the efforts of several individuals: A. B. Zahlan, D. H. Kenyon, L. T. Taskovich, whose contributions are gratefully acknowledged. Revised manuscript received December 12, 1963. RANDOM POLYMERS 33 REFERENCES Akabori, S. ( 1 9 5 9 ) . B. Pergamon Press, London and New York. Bemal, J . D. ( 1 9 5 1 ) . , London. Blois, M. , Zahlan, A. , and Maling, J. E . (1963). In preparation. Cope, F. , Sever, R. J . , and Polis, Β. D. ( 1 9 6 3 ) . Arch. Biochem. Biophys. 100, 171.
But it is not a sufficient concept. Mutability can occur only when first there is present a persistent reproducibility. Thus, mutability should be considered as a consequence of the persistent reproducibility and not vice versa. Thus, two operationally different meanings of the word, selectivity— one in the physicochemical sense and the other in the Darwinian sense, each of them valid when used in its proper context—can give an illusion that the word may operate in a third sense. I believe this is the origin of the unwarranted speculation that some kind of molecular selection may account for the appearance of the first persistently self-reproducing, internally controlled, living unit.
VALLNETYNE: What happens when you increase it by a factor of 10 or 100? What I am wondering is whether the nature of the reaction is influenced by concentration. DR. BLOIS: We have not looked into the efi^ects of concentration. THE FOLLY OF PROBABILITY PETER T . MORA National Institutes of Health, Bethesda, Maryland Probability is a very useful concept when we consider the evolution of the living. We believe that various living forms evolve because of the selec tion of mutants arising randomly.