MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Polarised light micrograph of Gomphonema sp. diatoms (triangular) and Oscillatoria sp. cyanobacteria (tubular). Diatoms are a group of photosynthetic, single-celled algae containing about 10,000 species. They form an important part of the plankton at the base of the marine and freshwater food chains. Cyanobacteria are blue-green algae that obtain their energy through photosynthesis. Magnification: x670 when printed 10 centimetres tall.
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