Problem:

Question 1: In nonprimate mammals, social aggression often depends greatly on the organizational and activational effects of __________.

Question 2: Lymphocytes are

A) specialized white blood cells.

B) produced in bone marrow.

C) stored in the lymphatic system.

D) all of the above E) both B and C

Question 3: Each facial expression starts to develop slightly earlier on the __________ side of the face than on the other side.

Question 4: Studies of monozygotic and dizygotic twins suggest that schizophrenia

A) is caused entirely by genetic factors.

B) is uninfluenced by genetic factors.

C) is greatly influenced by genetic factors.

D) is a mental disorder.

E) doesn't run in families.

Question 5: In 1957, this drug became the first drug to be marketed as an antidepressant:

A) iproniazid.

B) imipramine.

C) reserpine.

D) clozapine.

E) lithium.

Question 6: Benzodiazepines have been shown to reduce indices of fear and anxiety in the

A) elevated-plus-maze test.

B) risk-assessment test.

C) defensive-burying test.

D) all of the above

E) both A and B

Provide the correct answer and justification for your choice.