London, United Kingdom
Diatom Alga, Sem
Photograph - Photograph
Diatom. Coloured scanning electron micrograph (SEM) of a diatom alga. A diatom is a planktonic unicellular alga that has silica in its cell wall (frustule). This diatom is from the ocean. There are over 10,000 species of diatom algae, found in both marine and freshwater habitats.
May 1st, 2013
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