DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Phase Contrast light micrograph (LM) of Light micrograph of a fresh water pennate diatom (Hantzschia sp.). Diatoms represent about 25% of the plant biomass in the world. These microscopic unicellular plants are important biomass and oxygen producers. Through their photosynthesis, greenhouse gasses are converted to organic material and they therefore play a decisive role in the global carbon dioxide circulation. When individual cells die they remain as siliceous (silica dioxide) cell walls and sink to the bottom of the lake or ocean. Magnification: x100 when shortest axis printed at 25 millimetres.
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