According to research, the percentage of teen magazines devoted to advertising is approximately

The biological model seeks knowledge of abnormal behavior by studyingT

a. the biology of the body, particularly the brain b. biological scarring and structural abnormalities c. brain morphology as it affects bodily processes d. neuroimaging techniques

The amount of exercise done by the typical teenager tends to decline between ninth and twelfth grade

a. True b. False Indicate whether the statement is true or false