SEM of marine diatoms

SEM of marine diatoms

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Caption: Marine diatom. False-colour scanning electron micrograph of a marine diatom (unknown species). The diatoms form a division of nonflagellate unicellular algae, having delicate silica cell walls divided into two overlapping halves. Diatoms are split into two classes: the pennate diatoms which have a bilateral symmetry (such as that seen here); and the centric diatoms which have a radial symmetry. The cell walls of dead diatoms often form a deep deposit on the bed of lakes and seas; this deposit eventually forms diatomaceous earth. Magnification x300 at 35mm size.

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Keywords: alga, algae, algal, botany, diatom, diatoms, marine, marine diatom, nature, phytoplankton, plankton, plant, scanning electron micrograph, sem

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