MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Euglena protozoa and cyanobacteria. Polarised light micrograph of Euglena sp. protozoa (round) amongst the filaments of Oscillatoria sp. cyanobacteria (long, thin). Euglena sp. is a freshwater unicellular (single-celled) organism that obtains energy either from sunlight by photosynthesis, or by absorbing chemicals from its surroundings. Cyanobacteria (also known as blue-green algae) are bacteria that obtain their energy through photosynthesis. Magnification: x100 when printed 10 centimetres wide.
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