The DNA double helix is replicated because

d bonding propertys

explanation:

carbon can form so many different compounds not just with oxygen

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

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.