Researchers have been trying to gauge the impact of the 'graying of America.' They report that currently, 5% of the U. S. population is over the age of 75, and it is expected that in ten years, 15% of the U. S. population will be over the age of 75.

1) Do you expect that this shift in age composition will result in shifts in mortality rates why or why not?
2) how will you evaluate time trends in mortality rates? Be specific and provide examples ?

How does the fossil record provide evidence that the modern whale evolved from the anthracotheres? a) the modern whale looks like their ancestor the anthracotheres. b) the modern whale has all of the same structures as their ancestor. c) there is not enough evidence to suggest the the modern whale evolved from the anthracotheres. d) the anthracotheres has a structure that is still present in the modern whale, but is no longer of use to the modern whale.