Monozygotic is to ____ as dizygotic is to _____

Which of the following is a significant problem in confirming a diagnosis of somatic symptom disorder?

a. Patients don't always tell the truth about symptoms. b. A true somatic illness will often be detected only later, after medical treatment has been exhausted. c. There is no objective measure of a person's pain. d. Somatic symptom disorders overlap substantially with mood disorders.

The longest wavelengths we can see are experienced as ______ colors

a. red b. blue-violet c. green d. yellow e. orange