How long does it take for the body to break down food, turn it into energy, and eliminate waste?
a. less than 1 hour
b. up to 3 hours
c. between 24 and 48 hours
d. between 15 and 20 minutes

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.