Diatom alga, SEM

Diatom alga, SEM

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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, leg, legs, marine, nature, phytoplankton, plankton, plant, radial symmetry, scanning electron micrograph, seawater, sem, single-celled, symmetrical, unicellular

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