1. DNA Replication: The organism's single chromosome replicates itself, creating two identical copies.
2. Cell Growth: The cell grows larger, increasing its volume and cytoplasm.
3. Cell Division: The cell membrane and cell wall begin to pinch inward, eventually dividing the cell into two equal daughter cells. Each daughter cell receives one copy of the DNA and roughly half of the cytoplasm and other cellular components.
Key Points:
* No mitosis: Unlike multicellular organisms, single-celled organisms don't go through mitosis, the process of nuclear division.
* Direct DNA replication: The DNA replicates directly, without the complex stages of mitosis.
* Rapid growth: Single-celled organisms can grow and divide very quickly, especially in favorable conditions.
Examples of single-celled organisms:
* Bacteria: Some bacteria can divide every 20 minutes under optimal conditions!
* Protists: These single-celled eukaryotes include amoeba, paramecium, and algae.
* Yeast: These are fungi that can reproduce through both budding and binary fission.
Overall, binary fission is a simple and efficient way for single-celled organisms to reproduce and grow.
