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There's an unbroken chain between everything current living thing and the first living thing... I don't think that's an established fact at all. DNA is a very
by narag 8y ago
There's an unbroken chain between everything current living thing and the first living thing...
I don't think that's an established fact at all. DNA is a very complex system so it's reasonable to think that simpler systems predated it. Not that it affects your reasoning at all, since every current living thing that we know of does use DNA.
- agumonkey 8y agoI do believe there's an abstract principle that we share with anything that sustained its structure. Not a specific thing like a set of genes but the underlying set of chaos-avoiding rules that makes living forms living forms.
- asdff 8y agoThe RNA world hypothesis proposes that self-replicating RNA molecules proliferated before DNA, which would be that simpler system as it doesn't require complex protein machinery.