Why do hugs feel empty, and why is it always cold, why do I never feel bold. These things I ask myself each and every day, i just wish all my worries would melt away. What would you do if you were sad but never got a chance to tell anyone?

Why do rna viruses appear to have higher rates of mutation? a) rna nucleotides are more unstable than dna nucleotides.b) replication of their genomes does not involve proofreading.c) rna viruses can incorporate a variety of nonstandard bases.d) rna viruses are more sensitive to mutagens.