Diatom alga, SEM

Diatom alga, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Diatom alga. Coloured scanning electron micrograph (SEM) of a Bacteriastrum delicatulum diatom. This is a planktonic marine unicellular alga. It has a mineralised cell wall (frustule) divided into two halves. The frustule contains silica and provides protection and support. The long arms may be an aid to floatation. Magnification: x30 at 6x7cm size.

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Keywords: alga, algae, algal, bacteriastrum delicatulum, botany, centric, coloured, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, diatom, diatoms, frustule, marine, nature, phytoplankton, plankton, planktonic, plant, radial symmetry, scanning electron micrograph, sem, silica, siliceous, single-celled, unicellular

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