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Fine hairs on leaves, known as trichomes, serve various purposes, including protecting the plant from herbivores by making leaves less palatable or harder to eat. They can also help reduce water loss by creating a microclimate around the leaf, minimizing evaporation. Additionally, trichomes may reflect sunlight, helping to prevent overheating. In some cases, they can even play a role in trapping moisture or deterring pests through the secretion of substances.

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