Select all that apply. what takes place through the tissues of the alveoli? blood from cells receive o2 blood going to cells receives o2 blood coming from the cells releases co2 blood going to the cells receives co2

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.