BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY
Transmission electron micrograph (TEM) of a sago pondweed (Potamogeton pectinatus) cell. At centre is the nucleus, which contains the cell's genetic information in the form of DNA (deoxyribonucleic acid, black). Also within the cell are many vacuoles (white).
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