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Proc Natl Acad Sci U S A. 2000 Apr 25;97(9):4463-8.

Evolution of biological complexity.

Author information

  • 1Kellogg Radiation Laboratory 106-38, California Institute of Technology, Pasadena, CA 91125, USA. adami@krl.caltech.edu

Abstract

To make a case for or against a trend in the evolution of complexity in biological evolution, complexity needs to be both rigorously defined and measurable. A recent information-theoretic (but intuitively evident) definition identifies genomic complexity with the amount of information a sequence stores about its environment. We investigate the evolution of genomic complexity in populations of digital organisms and monitor in detail the evolutionary transitions that increase complexity. We show that, because natural selection forces genomes to behave as a natural "Maxwell Demon," within a fixed environment, genomic complexity is forced to increase.

PMID:
10781045
[PubMed - indexed for MEDLINE]
PMCID:
PMC18257
Free PMC Article

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