Radiolarian with diatoms, SEM

Radiolarian with diatoms, SEM

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Caption: Radiolarian with diatoms. Coloured scanning electron micrograph (SEM) of part of the shell (blue) of a radiolarian with three diatoms (brown and green). Radiolaria are single-celled protozoans that are found in marine plankton. They have spherical silicate skeletons with pores through which pseudopodia (false feet, not seen) of protoplasm project. As the animal floats in ocean currents the pseudopodia trap food particles on which the radiolarian feeds. Diatoms are minute, unicellular algae that also form a major part of marine plankton. This specimen was collected in the Caribbean Sea off the island of Barbados. Magnification: x10,000 when 10cm wide.

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Keywords: animal, aquatic, barbados, biology, caribbean sea, coloured, false-colour, false-coloured, invertebrate, invertebrates, marine, nature, plankton, protoplasm, protozoa, protozoan, pseudopodia, radiolaria, radiolarian, scanning electron micrograph, scanning electron microscope, sem, skeleton, test, unicellular, zoology, zooplankton

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