Rene has Down syndrome, which means that she has an extra chromosome on which chromosome pair?

By 2050, the older adult population in the Unites States is expected to include 1 in every ____ Americans:

a. 5 b. 6 c. 8 d. 10

Behavior modification works best when used to modify

a. a broadly defined behavior, for example, "I will be friendlier.". b. a personality trait, for example, "I will stop being irritable.". c. or attain a specific goal, for example, "I will get a 4.00 GPA this semester.". d. a specific overt behavior, for example, "I will stop smoking.".