In North America and Europe, breast development in girls entering puberty begins at about what age?
a. 9 c. 13
b. 11 d. 15
B
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People high in the need for achievement prefer moderately challenging tasks compared to either very easy or very difficult tasks because
a. succeeding on moderate tasks is possible and satisfying. b. succeeding on moderate tasks is most satisfying. c. succeeding on very easy tasks provides little satisfaction. d. succeeding on very difficult tasks is unlikely.
Remaining single is
a. no longer stigmatized. b. for people who do not hope to eventually marry. c. a sign that people are turning away from the institution of marriage. d. increasinglya choice of young adults.
More than six out of ten American adults are obese
Indicate whether the statement is true or false
Remembering that the Greek prefix epi- means "on top of" or "in addition to," which of the following is the correct definition of the term "epigenetics"?
a. The study of stable changes in the expression of a particular gene that occur without changes in DNA base sequences b. The study of ephemeral effects on genetic expression that do not affect DNA nor the environment c. The study of DNA over and above its effect on growth and development d. The study of DNA in larger, more complex species as well as single-cell organisms