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Penicillium spores

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Spores are covered by a very resistant layer.

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Spores can be airborne.

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They can last for years until they germinate in the right place.

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They have a nucleus inside, so they are eukaryotes.

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They also have several organelles.

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When they germinate, they develop hyphae

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and produce an antibiotic penicillin that can kill bacteria.