LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Composite image of a light micrograph of pond life behind an image of a light microscope. From top to bottom the three blue organisms are the single-celled protozoan Paramecium caudatum (top), the rotifer Platyas quadricornis (middle) and the rotifer Cephalodella (bottom).
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