Here's how it works:

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

2. Cell Elongation: The cell begins to elongate, separating the two DNA copies.

3. Septum Formation: A new cell wall (septum) forms across the middle of the elongated cell, separating the two copies of DNA.

4. Cell Division: The septum completes its formation, dividing the original cell into two identical daughter cells.

This process is relatively simple and efficient, allowing Bacillus megaterium to multiply rapidly in favorable conditions.