Here's a breakdown:

Binary Fission:

1. DNA Replication: The single circular chromosome of the cell replicates, creating two identical copies.

2. Cell Growth: The cell grows in size and the two copies of DNA move to opposite ends of the cell.

3. Cytokinesis: The cell membrane pinches inward and eventually divides the cell into two daughter cells, each containing a complete copy of the original cell's DNA.

Other forms of division:

While binary fission is the most common method, some single-celled organisms utilize other methods, including:

* Budding: A small outgrowth (bud) forms on the parent cell, grows, and eventually detaches to become an independent organism.

* Multiple Fission: The parent cell divides into multiple daughter cells simultaneously.

These processes ensure the continuation and propagation of single-celled organisms.