Diatom, colored scanning electron micrograph (SEM) 插畫檔

Diatom, coloured scanning electron micrograph (SEM). Diatoms are a major group of eukaryotic algae, and are one of the most common types of phytoplankton. A characteristic feature of diatom cells is that they are encased within a unique cell wall made of silica (hydrated silicon dioxide) called a frustule. Magnification: x800 when printed at 10 centimetres wide.