Green algae live in salt and fresh water, on land, on the surface of trees, stones or buildings, in damp, shaded places. Species living out of water are dormant during a drought. Chlamydomonas is a unicellular green pear-shaped alga. It moves in water with the help of two flagella located at the anterior, narrower end of the cell. Outside, chlamydomonas is covered with a transparent membrane, under which are located the cytoplasm with a nucleus, a red “eye” (a light-sensitive body of red color), a large vacuole filled with cell juice, and two small pulsating vacuoles. Chlorophyll and other pigments in Chlamydomonas are located in a large bowl-shaped plastid, which is called a chromatophore in algae (translated from Greek – “light-carrying”). Chlorophyll, contained in the chromatophore, imparts a green color to the entire cell.
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