MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Rotifer and desmid. Polarised light micrograph of a Philodina sp. rotifer (lower left) and Netrium sp. desmid (green, oval) green algae. Rotifers are microscopic aquatic animals that are related to roundworms. Desmids are a common group of freshwater single-celled algae that have intricate cell walls. Magnification: x100 when printed 10 centimetres wide.
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