How did the geocentric theory change over time as increased scientific knowledge led to increased consensus within the scientific community?
a. scientists demonstrated that earth revolves around the sun.
b. scientists proved that earth was the center of the universe.
c. the sun began to rise in the east several centuries ago.
d. the observations for a geocentric solar system became increasingly well documented.

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.