1. Chlamydomonas is a simple, unicellular, motile fresh water algae. They are oval, spherical or pyriform in shape.
2. The cell is surrounded by a thin and firm cell wall made of cellulose.
3. The cytoplasm is seen in between the cell membrane and the chloroplast.
4. The cell contains large dark nucleus lying inside the cavity of the cup shaped chloroplast.
5. The anterior part of the cell bears two flagella which helps in locomotion.
6. Two contractile vacuoles are seen at the base of each flagellum.
7. The anterior side of the chloroplast contains a tiny red coloured eyespot.
