In the United States, 82 percent of pregnancies to mothers 15 to 19 years of age are unintended.

_____ refers to a self-centered and self-concerned approach toward others.

In the United States, 82 percent of pregnancies to mothers 15 to 19 years of age are unintended.

According to evolutionary psychologists, natural selection favored females who chose multiple partners to have many children.

_____ is a hormone associated in boys with genital development, increased height, and deepening of the voice.

_____ is the illicit drug most widely used in the United States, and its use by adolescents increased from 2008 to 2013.

According to evolutionary psychologists, natural selection favored females who chose multiple partners to have many children.

Identity encompasses an individual’s personality characteristics.

_____ is a hormone associated in boys with genital development, increased height, and deepening of the voice.

Gender _____ involves a sense of one’s own gender, including knowledge, understanding, and acceptance of being male or female.