Ninactive substance or condition that has the appearance of the independent variable and that may cause participants in an experiment to improve or change behavior due to their belief is called

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?

Which of these is the best example of a cause-and-effect chain of events? 1. alonzo went to the music festival. 2. carmen went to the same music festival. 3. alonzo met carmen at the music festival. 1. yosef bought a new car from a dealership. 2. bailey bought a car from the same dealership. 3. bailey paid more for his car than yosef did. 1. the high school football team played a game on friday night. 2. the drama club put on a play on friday night. 3. maya watched the football game instead of the play. 1. a fast food restaurant ran an advertisement on television. 2. hank saw the advertisement and got hungry. 3. hank went to the fast food restaurant and bought food.

How have people adapted physically to different environments? why do you think these differences developed?