DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of Purple sea urchin, immature spines (Strongylocentrotus purpuratus; echinoderm). Strongylocentrotus purpuratus, known as the purple sea urchin, lives along the west coast of North America from Mexico to British Columbia. This sea urchin lives in lower intertidal and nearshore subtidal communities. Strongylocentrotus purpuratus is one of several biomedical research models in cell and developmental biology. The genome was completely sequence in 2006. Magnification x32 when shortest axis printed at 25 millimetres.
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