The first genetic material on earth was probably the first genetic material on earth was probably self-replicating rna molecules oligopeptides located within protocells dna molecules whose information was transcribed to rna and later translated in polypeptides dna produced by reverse transcriptase from abiotically produced rna

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.