Answer:
Small scale convergence
Explanation:
This term in meteorology occurs in a convergence zone; a region in the atmosphere where two air flows meet and interact, usually resulting in major weather conditions. A Small-scale convergence will produce situations ranging from isolated cumulus clouds to large areas of thunderstorms.
Since each codon consist of 3 nucleotides, 4 cordons can be formed by 12 nucleotides. (but please make sure that you check this answer. I am not completely sure)
Natural selection occurs to give help the best survival chance to the organisms.
The DNA virus uses nucleus of the host to replicate it genetic material since it lack reverse transcriptase enzyme.The similarities between the DNA virus with human protein it make difficult to treat this virus without damaging the host cell.
while
RNA virus has reverse transcriptase enzyme which is used to replicate its genetic material, but it lack ability to check errors, which led to higher mutation rate.The transcriptase enzyme is used to make vaccine which is used to treat RNA virus
