An important trend in the study of human development involves incorporating many theoretical perspectives in order to better explain development. Which of the following describes this approach?

A teratogen is:

A) an environmental agent that can produce a birth defect B) A genetic or chromosomal abnormality that may produce a developmental disorder C) any physical defect in an unborn child D) A fertilized egg that undergoes rapid cell division

Which statement concerning the developmental period known as "emerging adulthood" is most accurate according to Arnett?

a. It is a life stage in which most people have not yet made commitments to the stable roles of love and work that structure adult life for most people. b. Compared to emerging adults of past generations, today's emerging adults are more dependent on their romantic partners. c. Emerging adulthood is a period that replaces middle age. d. It is more common in developing countries than in developed countries.