The twentieth century's unique addition to the definition of old age is the idea of
a. dementia.
b. ageism.
c. inevitable decline.
d. retirement.
Question 2
The construct of middle-age emerged when
a. a more educated workforce continued working longer.
b. increased consumerism in the early 20th Century created a desire for greater wealth.
c. the loss of healthy young men during World Wars I and II created an excess of healthy, marriageable young women.
d. 20th-century parents began to bear fewer children and live long enough to see their children grow up and leave home.
Apollo Belvedere (detail), Roman copy after a 4th-century BCE Greek original.
Nucleophilic addition reaction of aldehydes and ketones
Early 20th century warming
Continental Drift: An Idea Before Its Time
A pedigree for albinism collected in the early years of the twentieth century by Charles Davenport,
Generation of various modified dihybrid ratios from the nine unique genotypes