MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Desmids and amoeba. Polarised light micrograph of a Closterium sp. desmid (long, left) and Arcella sp. testate (shelled) amoeba (round, centre) on sphagnum sp. moss. Desmids are a common group of freshwater single-celled algae that have intricate cell walls. Arcella sp. amoeba are found in freshwater ponds and puddles. Magnification: x200 when printed 10 centimetres wide.
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