Humans emerged as a species about _________ years ago. a. 2 ...

[dakota nelson]

Humans emerged as a species about _________ years ago.
 
  a. 2 billion c. 2 million
  b. 20 million d. 200,000

Question 2

In a study of aggression in preschool children, each of three groups regularly saw one of three types of TV shows: aggressive programs (such as Batman), prosocial programs (Mister Rogers' Neighborhood), and neutral programs (such as Disney nature films). Aggressive behavior was then assessed. What was the dependent variable?
 
  a. the type of TV show c. the number of groups of children
  b. the children's level of aggression d. the age of the children

[mcomstock09]

Answer to Question 1

C

Answer to Question 2

B