What did sumerians believe? choose all answers that are correct a. the sumerians believed it was their responsibility to keep the gods happy. b. the sumerians believed in many gods. c. the sumerians believed the gods were powerful and unpredictable. d. sumerians believed the gods wanted them to be happy.

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.