The vagina, scrotum, and testes are all examples of _____ sex characteristics

Research on motivation and culture would suggest that Susan, an American child, would be more motivated to perform while engaging in which of the following tasks?

a. A puzzle that her teacher asked her to do b. Reading a book that he mother picked out for her c. A board game that her friend picked out. d. A puzzle that she picked out on her own

Restless leg syndrome may be associated with low levels of ____ in the brain

a. ?iron b. ?calcium c. ?magnesium d. ?sodium