Ascientist was studying bones from an individual who died thousands of years ago. which portion of the bones was the scientist most likely studying? minerals osteocytes marrow cartilage

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.