ROGELIO MORENO / SCIENCE PHOTO LIBRARY ROGELIO MORENO / SCIENCE PHOTO LIBRARY
Pediastrum alga. Polarised light micrograph of a Pediastrum green alga colony. Pediastrum is a type of freshwater colonial algae. The colony comprises a central cell surrounded by concentric rings of cells. The outermost cells each have two lobes projecting outwards, giving the colony a 'spiky' appearance. Magnification: x3000 when printed at 10 centimetres.
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