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Proceedings of the National Academy of Sciences of the United States of America Volume 1

Proceedings of the National Academy of Sciences of the United States of America Volume 1

National Academy of Sciences
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book from the publisher. Not indexed. Not illustrated. 1915 ...will appear as Volume 3 of Papers of the Mount Wilson Solar Observatory.6 1 Mt. Wilson Contr. No. 80; Astrophys. J., 39, 307 . 'Ibid; Mt. Wilson Contr. No. 70; Astrophys. J., 38, 241 . 1 Potsdam Publ. No. 67. Mt. WUson Contr. Nos. 97, 98, 102; Astrophys. J. Publications of the Carnegie Institution of Washington. MITOSIS IN TRICHOMONAS By Charles Atwood Kofoid and Olive Swezy ZOOLOGICAL LABORATORY. UNIVERSITY OF CALIFORNIA Praented to the Academy, March 16. 1915 The process of cell-division in the simpler Protozoa is significant in its relation to the evolution of nuclear and extra-nuclear structures. The behavior of the extra-nuclear organelles in unicellular organisms during the process of binary fission is significant as to the origin and relationships of such structures as flagella, blepharoplast, and axostyle. One of the distinctions between the Ciliata and the Flagellata has been held to be the direction of the plane of division, transverse in the former, longitudinal in the latter; therefore all reported cases of transverse division in Flagellata should be critically inspected. Observations on mitosis in Trichomonas augusta, a flagellate parasitic in the digestive tract of amphibians enable us to make a fuller correlation of mitosis in the Flagellata with that in the Metazoa, to correct or supplement the observations of others regarding mitosis in trichomonad flagellates, and to establish on ample morphological grounds the essentially longitudinal nature of their division. Our conclusions have been verified in all essential features, in eleven species of seven genera parasitic in vertebrates. The conclusions are based on hundre...
Language
English
Pages
258
Format
Paperback
Release
January 01, 2012
ISBN 13
9781130967036

Proceedings of the National Academy of Sciences of the United States of America Volume 1

National Academy of Sciences
0/5 ( ratings)
Read Download
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book from the publisher. Not indexed. Not illustrated. 1915 ...will appear as Volume 3 of Papers of the Mount Wilson Solar Observatory.6 1 Mt. Wilson Contr. No. 80; Astrophys. J., 39, 307 . 'Ibid; Mt. Wilson Contr. No. 70; Astrophys. J., 38, 241 . 1 Potsdam Publ. No. 67. Mt. WUson Contr. Nos. 97, 98, 102; Astrophys. J. Publications of the Carnegie Institution of Washington. MITOSIS IN TRICHOMONAS By Charles Atwood Kofoid and Olive Swezy ZOOLOGICAL LABORATORY. UNIVERSITY OF CALIFORNIA Praented to the Academy, March 16. 1915 The process of cell-division in the simpler Protozoa is significant in its relation to the evolution of nuclear and extra-nuclear structures. The behavior of the extra-nuclear organelles in unicellular organisms during the process of binary fission is significant as to the origin and relationships of such structures as flagella, blepharoplast, and axostyle. One of the distinctions between the Ciliata and the Flagellata has been held to be the direction of the plane of division, transverse in the former, longitudinal in the latter; therefore all reported cases of transverse division in Flagellata should be critically inspected. Observations on mitosis in Trichomonas augusta, a flagellate parasitic in the digestive tract of amphibians enable us to make a fuller correlation of mitosis in the Flagellata with that in the Metazoa, to correct or supplement the observations of others regarding mitosis in trichomonad flagellates, and to establish on ample morphological grounds the essentially longitudinal nature of their division. Our conclusions have been verified in all essential features, in eleven species of seven genera parasitic in vertebrates. The conclusions are based on hundre...
Language
English
Pages
258
Format
Paperback
Release
January 01, 2012
ISBN 13
9781130967036

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