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Model systems for life processes on MarsIn the evolution of life forms nonphotosynthetic mechanisms are developed. The question remains whether a total life system could evolve which is not dependent upon photosynthesis. In trying to visualize life on other planets, the photosynthetic process has problems. On Mars, the high intensity of light at the surface is a concern and alternative mechanisms need to be defined and analyzed. In the UV search for alternate mechanisms, several different areas may be identified. These involve activated inorganic compounds in the atmosphere, such as the products of photodissociation of carbon dioxide and the organic material which may be created by natural phenomena. In addition, a life system based on the pressure of the atmospheric constituents, such as carbon dioxide, is a possibility. These considerations may be important for the understanding of evolutionary processes of life on another planet. Model systems which depend on these alternative mechanisms are defined and related to presently planned and future planetary missions.
Document ID
19740058795
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mitz, M. A.
(NASA Headquarters Washington, DC United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1974
Publication Information
Publication: Origin of Life
Volume: 5
Subject Category
Chemistry
Accession Number
74A41545
Distribution Limits
Public
Copyright
Other

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