Diatom alga, SEM

Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Diatom. Coloured scanning electron micrograph (SEM) of a Bacteriastrum varians diatom. This is a marine planktonic unicellular alga. It has a mineralised cell wall (frustule) divided into two halves. The frustule contains silica and provides protection and support. It is a colonial diatom. The long branching legs are used as an aid to floatation. Magnification unknown.

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Keywords: alga, algae, algal, australia, australian, bacteriastrum varians, botany, centric, colonial, coloured, diatom, diatoms, floatation, floater, floating, images, leg, legs, magnified image, marine, microscopic photos, nature, phytoplankton, plankton, plant, radial symmetry, scanning electron micrograph, seawater, sem, single-celled, subjects, symmetrical, unicellular

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