Fungus, Can be eaten such as mushrooms, Mould breaks down dead material, Can cause illnesses such as athlete's foot, Can cause diseases in humans, Bacteria, Help our bodies to break down food, Help our bodies to absorb nutrients, Plaque can decay teeth, Can cause illnesses such as food poisoning, Viruses, Exposure can help humans improve their immune system, can cause illnesses such as colds, throat infections and chicken pox

Microorganisms

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