Which of the following statements are true? aids has been eradicated in most industrialized nations the body uses red blood cells to fight illness and disease millions of people die each year from diarrheal diseasesearly civilizations did not do much to treat the ill

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.