AMI IMAGES / SCIENCE PHOTO LIBRARY AMI IMAGES / SCIENCE PHOTO LIBRARY
Tobacco (Nicotiana alata) leaf. Coloured scanning electron micrograph (SEM) of the upper surface of a leaf from a flowering tobacco (Nicotiana alata) plant, showing its trichomes (leaf hairs). These large glandular trichomes secrete distasteful chemicals to deter pests from feeding on the leaves.
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