Karen knows that her neighbors often struggle to make ends meet. She sometimes offers to babysit for free because she can easily afford to do so and feels good that she can help in this small way. This example most clearly illustrates the

Basic-level concepts

a. always differentiate clearly between a member and a nonmember of a category. b. are the most efficient to access. c. contain a small number of individual exemplars and their common characteristics. d. are based on differences rather than similarities. e. are more subordinate than superordinate.

Cherisse is four weeks pregnant. Routine blood screening reveals that she is carrying syphilis. What should Cherisse know?

A) Maternal syphilis easily crosses the placenta. B) She must wait until the sixth month, and then she can be treated with antibiotics. C) The syphilis organism can only cross the placenta in the first two months of her pregnancy. D) She can prevent transmission to the fetus by being treated with antibiotics before the fourth month of.her pregnancy.