ILL MARK BRAINLIEST HELP ALL GRADES ARE DUE TOMORROW ANSWER ALL QUESTIONS PLEASE

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.

Which type of respiration takes place when there is no oxygen present

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms