You are walking after dark. A sudden noise frightens you. Your heart pounds, your pulse races, and your breathing rate increases. These responses are due to your ____.
a. parasympathetic nervous system
b. sympathetic nervous system
c. somatic nervous system
d. immune system
Question 2
The frequency of homosexuality in men is highest if ____.
a. a sister is homosexual
b. an adopted brother is homosexual
c. a dizygotic twin brother is homosexual
d. a monozygotic twin brother is homosexual