Bacteria asexually reproduce. Microcystis uses binary fission to split into daughter cells. Those two daughter cells will then grow to size of the parent. After the size is reached the daughter cells will then grow split into two like their parent. Bacterial genetic recombination is interesting and allows for bacteria to evolve quickly and adapt to certain conditions. This is why taking antibiotics as you are instructed is very important. Did you know that many antibiotics come from fungi?