Download Habitable Planets for Man by Stephen H. Dole PDF

By Stephen H. Dole

Liveable Planets for guy examines and estimates the chances of discovering planets liveable to guy, the place they could be came upon, and the quantity there's in our personal galaxy. the writer offers intimately the features of a planet which could supply a suitable atmosphere for humankind, itemizes the celebs nearest the earth probably to own liveable planets, and discusses the way to look for liveable planets. curiously for our time, he additionally supplies an appraisal of the earth as a planet and describes how its habitability will be replaced if a few of its simple houses have been altered. it is a reprint of an version initially released in 1964.

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Ed. 1957. The species problem, 155. : AAAS. 20. Tait, A. 1970. Enzyme variation between syngens in Paramecium. Biochem. Genet. 4:461. 20a. Allen, S. L. and Gibson, I. 1971. Intersyngenic variations in the esterases of axenic stocks of Paramecium aurelia. Biochem. Genet. 5:161. 21. Allen, S. , Byrne, B. , and Cronkite, D. L. 1971. Intersyngenic variations in the esterases of bacterized Paramecium aurelia. Biochem. Genet. 15:135. 22. Allen, S. , Farrow, S. , and Golembiewski, P. A. 1973. Esterase variations between the 14 syngens of Paramecium aurelia under axenic growth.

And Nerad, T. A. 1983. Paramecium sonneborni n. , a new member of the Paramecium aurelia species complex. J. Protozool. 30:128. 11. Haggard, B. W. 1974. Interspecies crosses in Paramecium aurelia (syngen 4 by syngen 8). J. Protozool. 21:159. 12. Sonneborn, T. M. 1947. Recent advances in the genetics of Paramecium and Euplotes. Adv. Genet. 1:264. 13. Sonneborn, T. M. 1975. Paramecium aurelia. In Handbook of genetics, ed. R. C. King, chap. 20. Vol. 2. New York: Plenum Press. 14. Beale, G. H. 1954.

However, Paramecium cannot live indefinitely without a micronucleus. Strains that have been artificially enucleated invariably die out after a number of fissions. Of the many hundreds of stocks established in the laboratory over the years, all have micronuclei. Their presence and vesicular structure are specific features of the P. aurelia complex. The micronuclei of members of the P. 11. The actual number is characteristic of the stock. As we will see in Chapter 8, micronuclei are inactive, while macronuclei contain the active genes of the cell.

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