SEM of diatoms and blue-green algae

SEM of diatoms and blue-green algae

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Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Diatoms & blue-green algae. Coloured scanning electron micrograph (SEM) of groups of Navicula sp. diatoms (brown). Also seen in the image are strands of blue-green algae (blue). Diatoms are single celled algae that exist in huge numbers in marine and freshwater environments. Each diatom has an intricately patterned cell wall, or frustule, made of silica and pectin. The wall is in two halves which fit neatly together. They are a major constituent of plankton. As such, they are of great importance to the food chains in their environment. Blue-green algae or cyanobacteria are linear colonies of single-celled organisms. Magnification: x610 at 6x7cm size.

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Keywords: alga, algae, algal, blue-green algae, botany, diatom, diatom and blue-green, diatoms, nature, navicula sp., oscillatoria, phytoplankton, plankton, plant, type

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