Which of the following is a function of the kidneys? A. To catch toxins in the blood and send them to the liver
B. To remove carbon dioxide from the blood and send it to the urinary
bladder
C. To remove salts from the blood so osmosis works properly
O D. To catch nutrients that slipped away from the digestive system

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.