DR. JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR. JEREMY BURGESS / SCIENCE PHOTO LIBRARY
Scanning electron micrograph of bacteria Agrobacterium tumifaciens grown on the surface of cells from Nicotiana plumbaginifolia, the tobacco plant. This bacterium causes tumours (cancer) in plant cells. Magnification: X 25,000 at 8x10 inch size.
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