A snooty vampire will only drink type AB blood. As he is about to bite your neck, you quickly shout “STOP! I can’t possibly have type AB blood because my mother has type O blood.” Explain your answer.

thinking it would be physical characteristics

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.