The atmosphere that we depend on for our survival is enriched by numerous cyanobacteria. this fact justifies which characteristic of cyanobacteria

this would be a math

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.