Light micrograph of diatoms, Diatoma sp.

Light micrograph of diatoms, Diatoma sp.

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Caption: Light micrograph of a group of diatoms, Diatoma sp.. Diatoms are a distinctive group of single- celled algae containing about 10,000 species. They form a large part of the plankton at the base of the marine & freshwater food chains. A characteristic feature of diatoms is their intricately patterned, silica-impregnated glass- like cell wall or frustule. The frustule consists of 2 halves which fit together like the lid and bottom of a box. It is often decorated with rows of tiny holes, known as striae, which are arranged radially in centric diatoms and on the 2 sides of a central axis in pennate diatoms. Magnification: x400 at 35mm size.

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Keywords: alga, algae, algal, botany, diatom, diatoma, diatoms, nature, phytoplankton, plankton, plant, type

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