Please decide whether each activity is better described as anaerobic or aerobic exercise. Simply write 'aerobic' or 'anaerobic' next to each activity. Ice Skating
Heavy-weight Training
Sprinting
Swimming
Tennis
Dancing
Jump Roping

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.