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Ulothrix (you-low-thricks) a filamentous green alga with small flat plastids adhering to the inner face of the cell walls. Differential interference contrast.
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Loose aggregate of a filamentous green alga found in South Twin Lake is Ulothrix, one of the types that forms mats.
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The green structures in the center of the Ulothrix cells are the plastids (chloroplasts) where the pigments are located. They contain bright green chlorophylls that trap sunlight for photosynthesis.
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Detail of plastids of filamentous green alga. Phase contrast optics.
