Which category of chemicals includes adenosine and several of its derivatives?

Menarche is to spermarche as ____ is to ____.

a) ejaculation; menstruation b) female; male c) male; female d) testes; ovaries

What is the term for the people and groups that can provide emotional comfort and personal and financial resources during times of need?

A) Friendship B) Camaraderie C) Peer counseling D) Social support