Science Source Feb 2010
EN_90286490_0328
![Science Source Feb 2010](img/medium/arch1/dvd0113/25/EN_90286490_0328.jpg)
Transmission electron micrograph (TEM) of the tobacco mosaic virus (TMV). Each virus consists of a protein coat with internal RNA genetic material. Some viruses are attached end-to-end. The virus enters a host cell in a tobacco plant and commandeers its DNA, instructing it to reproduce more TMV's. The effect of TMV infection varies from outright death of the host plant to severe lesions or mottling of the leaves. Plant viruses like TMV are transmitted by insects, pests and nematode worms. Magnification: 220,000x.
2010-02-13
EAST NEWS
Science Source
Omikron
9a7369
7,17MB
32cm x 42cm by 300dpi
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