EYE OF SCIENCE / SCIENCE PHOTO LIBRARY EYE OF SCIENCE / SCIENCE PHOTO LIBRARY
Diatom, coloured scanning electron micrograph (SEM). Diatoms are a group of photosynthetic, single-celled algae containing about 10,000 species. They form an important part of the plankton at the base of the marine and freshwater food chains. Their characteristic feature is the intricately patterned, glass-like cell wall, or frustule, which often has rows of tiny holes, known as striae (seen here). This specimen was found in water from the leaf base of a bromeliad (Bromeliaceae) plant. Magnification: x10,000 when printed 10cm wide.
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