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The Apt test should not be performed on a black,tarry stool.
Peer Groups Shift
The phenomenon where the composition or dynamics of a social group changes over time.
Same-Sex Cliques
Social groups comprised of members of the same sex, common in adolescence, providing contexts for socialization and identity development.
Heterosexual Crowds
Collections or groups of individuals who exclusively experience sexual attraction to members of the opposite sex.
Homophily
The degree to which friends are similar to each other.
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