Phototherapy seems to work because it:

Despite its dangers, a young man continues to take cocaine because of the feeling of euphoria it produces for him. This powerful arousal of his nervous system is probably due to cocaine's ability to

a. inhibit enzymes that break down neurotransmitters. b. increase the release of neurotransmitters. c. block the receptor sites for neurotransmitters. d. prevent neurotransmitters from being reabsorbed into the synaptic vesicles.

One possible way that homosexuality might have been selected for through evolution is by

A) kin selection. B) multiplicative evolution. C) selective attrition. D) evolutionary sublimation. E) open selection.