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Germinating fungal spores. Coloured transmission electron micrograph (TEM) of germinating fungal spores (rounded structures) producing hyphae (thinner structures). A spore is a small, usually single-celled reproductive structure that, upon germination, can develop into a new individual, such as a fungus. A germinating spore produces a slender, thread-like filament (hypha). The hypha requires nutrients and releases enzymes to breakdown nearby substrates. Once many hyphae have absorbed enough nutrients, they will grow into a mycelium, the vegetative part of a fungus.
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