Choose all the answers that apply.

What can exercise do?

relieve anxiety
increase energy
strengthen muscles
decrease stress
reduce risk of diabetes

Why is excretion necessary to maintain homeostasis?

Name the glands associated with human 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.