If students don't understand the vocabulary that a professor is using, the culprit may be:

Environmental factors can lower one's intelligence level but cannot aid in improving intelligence

Indicate whether this statement is true or false.

Until about what age do children believe that wearing the clothes of the opposite sex or engaging in opposite-sex activities changes the individual, at least temporarily, into a member of that sex

a. 1 or 2 years of age c. 4 or 5 years f age b. 3 or 4 years of age d. 6 or 7 years of age