KEY TAKEAWAYS •
Fungi have a kingdom of their own based on the uniqueness of their cell walls.
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The basic form of a fungus is a called a hypha. Many hyphae will together form a mycelium.
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The fungus that is seen macroscopically is usually the fruiting body, including that seen in mushrooms.
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The hyphae can be multinucleated or can be septate with septa that separate the different aspects of the hypha.
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The fungi often form mutualistic relationships—with animals, cyanobacteria, algae, or plants.
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