__________ refers to parental mentoring that is matched to a child's developmental level

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

Adolescence refers to the period of development between:

a. ages 13 and 19. b. grade school and college. c. puberty and adulthood. d. high school and marriage.