Chlorophyta

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Chlorophyta

the green algae, which constitute the largest division of algae, ranging from microscopic unicellular forms which are nonmobile or have flagella (see FLAGELLUM), to large forms with a flattened THALLUS. Reproduction may be asexual (see CELL DIVISION, FRAGMENTATION, ZOOSPORE) or sexual (see ANISOGAMY, ISOGAMETE). They occur terrestrially in damp places such as tree trunks, in fresh water or in the marine environment.