Ashley and Mary-Kate are twins who are genetically identical. What type of twins are they?
A. monozygotic twins
B. fraternal twins
C. dizygotic twins
D. wombmates
Answer: A
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When we use retinal disparity to perceive depth, what do we compare?
a. Apparent size and apparent speed b. Apparent shape and apparent movement c. Reactions of the cones and the rods d. Views seen by the left and right eyes
Why do humans suffer from sleepiness, decreased muscle activity, and decreased sex drive during illness?
A. The illness suppresses nearly all brain activity. B. The virus saps the organism's energy and uses it to attack the body. C. They are useful ways of conserving energy while the body is attacking the illness. D. An illness decreases blood flow to the brain and muscles.
Skinner's use of intervening variables is
a. similar to Hull's use. b. not as extensive as Hull's use. c. to mediate between stimuli and responses. d. nonexistent.
Native Americans tend to be more accepting of same-gender sexual activity than most other American ethnic groups
Indicate whether the statement is true or false