The thyroid gland secretes a hormone called thyroxin

The study of Preschool in Three Cultures that you learned about in class:

a. demonstrated that young children who experience different cultures tend to be better able to adapt to social challenges as teens b. demonstrated that young children are more successful in school when they get a lot of individual attention from teachers c. involved naturalistic observation of preschool children d. involved structured observation of preschool children

A circadian rhythm is a biological fluctuation that occurs more than once a day

Indicate whether this statement is true or false.