What two body parts must be cleaned before food preparation

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.

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Which term describes a normal value for something in the body? a.homeostasis b.set point c.feedback loop d.integration center