Running a marathon is an example of which component of physical fitness? A. Muscular Strength
B. Power
C. Hand and Eye Coordination
D. Cardiovascular Endurance

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.