blood has traveled to john's leg muscle cells and is moving slowly whole dropping off oxygen and nutrients. what must be true about blood in this situation

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.

Susan’s wrist is tired from typing on her keyboard all day. she moves her wrist in a circle to stretch it out. what type of movement does her hand make around her wrist?

Which influences are classified as part of your social environment? a) traits b) friends c) habits d) foods? me !