Final answer:
Trichomes are small hair-like structures on leaves that prevent herbivory, restrict insect movement, and reduce the rate of transpiration. They are found on the epidermal surface of leaves.
Step-by-step explanation:
Trichomes are small hair-like structures on leaves that prevent herbivory, restrict insect movement, and store toxic compounds. They can also reduce the rate of transpiration by blocking air flow across the leaf surface. Trichomes are found on the epidermal surface of leaves and give them a fuzzy appearance.