Chlamydomonas are single-celled green algae, with two flagella, it is found in soil, ponds, and ditches.
Even though these cells can perform photosynthesis, they can also absorb nutrients through the cell surface. Their cell wall is not made of cellulose as it is on land plants.
They are part of the protist group, it is due to their lack of multicellular stage.
They have sexual and asexual reproduction. Asexual reproduction is mediated by zoospores and sexual reproduction.
It is most frequently that their sexual reproduction is by isogamy, but they can also perform anisogamy and Oogamy. In each way of reproduction, the cells become non-motile. and the male protoplasm of the male cell divides to produce 32-64 biflagellate gametes. But in anisogamy, the female cell protoplast divides to produce 8-16 biflagellate gametes.
The cells are liberated in water in each of the sexual ways of reproduction and then the female cell is fertilized by one (anisogamy) or more (oogamy) female gametes