Benefits of a strong core include a. greater body control during movement b. more efficient exertion of powe c. more effective metabolism and digestion d. greater flexibility of the lower body

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.