1. If a bulb burns out in circuit 1, what will happen to the other bulb in that circuit? 2. If a bulb burns out in circuit 2, what will happen to the other bulb in that circuit?

no i don't feel that humans have oversubscribed some medications

essentially, one bacterial cell splits into two daugurer cells. bacterial offspring don't need or get care from their parents because they are in a sense their own parents. that said, some bacteria can and do depend on other bacteria especially in harsh environments such as bacterial microfilms in hot water tanks.