Something that complicates genetic studies is that genes have different effects in different environments, such as the different outcomes for children with PKU with and without exposure to phenylalanine in the diet. This complication is referred to as

At work, whenever a team is experiencing conflict, they turn to Reena for help because she can set aside all the emotion from a situation and look at issues from a logical perspective. What type of intelligence do colleagues value in Reena?

a. verbal ability b. social competence c. problem solving d. concrete operations

The sample variance, SS/(n-1), is an absolutely unbiased estimator of the population variance.

a. true b. false