ERIKA CRADDOCK / SCIENCE PHOTO LIBRARY ERIKA CRADDOCK / SCIENCE PHOTO LIBRARY
Mouldy tomatoes. Moulds (grey) growing on tomatoes. Moulds are the fuzzy cobweb-like growths produced on organic matter by several different types of fungi. They begin as microscopic airborne spores which germinate on the surface of the tomatoes. The moulds then rapidly spread to form networks (mycelia) of fine filaments (hyphae). The moulds penetrate downwards into the tomatoes, digesting and absorbing nutrients.
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