Abiotic, biotic, and in-between

Details Abiotic, biotic, and in-between Abiotic, biotic, and in-between

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7097e...7k&link_type=abstract

Instruments, Methods, and Missions for Astrobiology XI. Edited by Hoover, Richard B.; Levin, Gilbert V.; Rozanov, Alexei Y.; Da

Biology

Scientific paper

In our search for the definition of life that will be relevant for astrobiology, we consider various entities that have some but not all of their features in common with the fully developed functioning life. We name these entities "life forms". Examples include viruses, spores, and partners in syntrophy (metabolically interdependent relationships). We introduce meaningful categories into which these life forms fit, and offer a definition of life in which they are included. Our suggested working definition of life is that life is a chemical phenomenon which occurs in space and time as a succession of life forms which combined have a potential to metabolize, reproduce, interact with the environment, including other life forms, and are the subject to natural selection.

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