Name three ways walking and jumping around have to do with improving overall fitness

What is one limitation of the myplate guidelines

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.

Someone with my pe hw i need it for tomorrow