How to distinguish Chlamydomonas and Chlorella from other algae?

Among themselves, they differ in the presence of a flagellum for movement: chlamydomonas have it, but chlorella does not.
And they differ from other algae in the number of cells that make up their body. Chlamydomonas and chlorella are unicellular algae, and the rest are multicellular algae.



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