In the early 1900s when Greta's great-great-grandmother was born, ___ of America's population was over 65 years old. By 2007 when Greta was 10, her family celebrated her grandmother's 67th birthday, making her grandmother one of more than _______ as many Americans aged over 65 than there were in 1900.
A) 10; two times
B) 2; three times
C) 4; three times
D) 6; four times
Question 2
As our population ages, how does this affect work to meet the first Healthy People 2020 goal to increase health expectancy?
A) It will make little difference.
B) It will make this work easier.
C) It will make this work harder.
D) It will make it less important.
Exponential growth in the Canadian migratory population of the whooping crane after 70 years of cons
Over nearly 30 years, humans removed many polar bears for a variety of reasons, from a population in
The common squirrel monkey (Saimiri sciureus) is a small New World primate from the Cebidae (squirre
In American Progress (1872), John Gast depicts a feminized (and eroticized) America moving westward,
Breakdown of the Population by Schooling and Wages
World Population, 10,000 B.C. to A.D. 2010