Blue-green alga, Chroococcus

Blue-green alga, Chroococcus

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Credit: ASTRID & HANNS-FRIEDER MICHLER/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of the unicellular cyanobacteria (blue-green algae), Chroococcus, seen in its four- celled growth stage. Chroococcus cells are typically surrounded by a colloidal sheath (transparent, seen here); after cell division many cells may cohere, due to this sheath, to form colonies. Cyanobacteria are primitive algae and regarded closer to bacteria. They are prokaryotic organisms with no membrane-bound nucleus, & their chloroplasts are not restricted by a membrane but lie free in the cell. Chroococcus is found in aquatic environments, including waterfalls and peat soils. Magnification: x30 at 35mm size.

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Keywords: 4-cell growth, alga, algae, algal, blue-green, blue-green algae, botany, chroococcus, cyanobacteria, light micrograph, nature, plant, type, unicellular, unicellular algae

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