Describe how Healthy People 2020 can be used by an individual, a family and a community. Justify your response using two or more complete sentences

What is thought to have caused the mass extinction at the end of the cretaceous period?

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.

Which characteristics are typical of a human population in the postindustrial stage?