[blam]

"There are loads of so-called junk DNA, which doesn't seem to code for anything, and may have been spliced in by virus infections long ago. Or perhaps it relates to a lack of meaning in nuclear DNA. ;') "

If it didn't convey some advantage for us we wouldn't still have it, would we?

[SunkenCiv]

Mutations arise; also there are viruses. There isn't any advantage to any of it, only the occasional disadvantage -- and that's only supposition. :')

[patton]

Not really - what does your appendix do?