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Bread mould. Coloured scanning electron micrograph (SEM) of Penicillium sp. mould growing on bread. The yellow fibrous structures are hyphae, which make up the main body of the fungus. They penetrate the bread and absorb nutrients. The small green dots are the conidia, the spores of the mould. These are borne in clusters on specialised hyphae known as conidiophores. Magnification: x350 when printed 10cm wide.
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