How do members of the domain Bacteria and members of the Domain Eukarya differ?
O All bacteria are unicellular; all Eukarya are not.
O All bacteria lack a nucleus, all Eukarya have one.
O All bacteria are tiny; no Eukarya are.
O All bacteria have cell walls; all Eukarya do not.

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.