Tyler is over training his muscles if he is a: gaining muscle strength too quickly b: using weights that are too heavy c: taking breaks that are too long between sets d: needing to eat too many calories each day

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.