MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Spirogyra algae. Rheinberg illuminated light micrograph of Spirogyra sp. algae. This filamentous green algae is named for the spiral arrangement of its chloroplasts (green). It's cylindrical cells connect end to end in long green filaments. Magnification: x400 when printed 10 centimetres wide.
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