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

d. self-replicating RNA molecules

Explanation:

RNA molecules are single stranded, not included double stranded RNA structures from self folding, and DNA molecules are double stranded. It is thus believed that RNA molecules was the original genetic material and eventually DNA evolved from RNA and overtook RNA as the genetic material given DNA enhanced stability. Thus the answer has to be RNA.

surface modification is a versatile tool and has been widely used in material science and engineering that has significantly facilitated the study and characterization of complex materials. at  matexcel, experienced experts in surface science can offer tailored efforts to meet the specific needs from our clients.

answer/// to address the needs of adults with mental illness and increase their ability to function;