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Planktonic Diatom Alga, Sem
Photograph - Photograph
Planktonic diatom alga. Coloured scanning electron micrograph (SEM) of a Coscinodiscus sp. diatom alga (purple). A diatom is a planktonic unicellular alga that has silica in its cell wall (frustule). Diatoms are photosynthetic, and they are found in both marine and freshwater environments. The cell wall of a diatom is often intricately patterned, and has rows of tiny holes, known as striae.
May 6th, 2013
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