"what evidence supports the hypothesis that rna was the genetic material early in evolutionary history"

The evidences that support the hypothesis that RNA was the genetic material:

1.Some viruses possess RNA genomes.  

2.  RNA has the capacity to replicate itself.

Beside these two evidences, the property of RNA to catalyze chemical reactions that are critical for life is another proof of RNA world.

wouldnt it be the scientific method?

explanation:

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