Leaf surface. Coloured scanning electron micrograph (SEM) of the varied trichomes on the underside of a leaf from a sunflower (Helianthus sp.). Trichomes are structures that grow out from the epidermis, and can have several functions, including protecting the rest of the leaf from adverse weather conditions, such as frost.

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TOP10174272

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達志影像

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RM

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須由TPG 完整授權

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