On Sep 2, 2011, at 10:34 AM, Jerry Foote wrote:

> Has the structure of DNA evolved?

        DNA is DNA; it is chemically defined. But being a polymer, the length, 
complexity, organization, etc. has evolved over time, and it is these 
characteristics that make it biologically interesting. You can trace 
evolutionary lineage based on the degree of difference between two species' DNA.


-- Ed Leafe




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