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When food goes bad most often bacteria that are present on the food have multiplied to such a degree that they become visible and produce tastes, odors, textures and colors that were not in the original food. Mold can also develop on food, especially bread, cheese, fruits and vegetables, and produce changes in food similar to bacteria, although many molds have the appearance of fine hairs (hyphae) on their surface. Food can also undergo changes due to active enzymes within the food, especially fruit, which cause the food to ripen but if left too long can lead to overripeness.

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15y ago

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