When asked to write an essay on why she is who she is, Julia describes how her hopes and dreams influence how she behaves, thinks, and feels. Julia is focusing on how _____ events determine her personality.

The basic tenet of ________ is that when we feel empathy for another person's plight, we will help that person regardless of what we may stand to gain

a. kin selection b. evolutionary psychology c. the reciprocity norm d. the empathy-altruism hypothesis

T cells and B cells are

A) lymphocytes. B) antigens. C) antibodies. D) phagocytes. E) macrophages.