Tomato plants are fuzzy due to the thin hairs on the stem, leaves, and fruit. These hairs are called trichomes, and they help a tomato plant to resist cold, drought, ultraviolet light, and insect or animals pests. Trichomes also release oils that give tomato plants their distinctive scent.

Why do some plants have hairy stems?

Hairs on plants growing in areas subject to frost keep the frost away from the living surface cells. In windy locations, hairs break up the flow of air across the plant surface, reducing transpiration. Dense coatings of hairs reflect sunlight, protecting the more delicate tissues underneath in hot, dry, open habitats.

Which plant has stingy hairs on their stems?

Stinging nettle (Urtica dioica) is found throughout Eurasia, North America, and northern Africa, and has been introduced to parts of South America. The leaves and young stems of this herbaceous plant are fitted with stinging hairs tipped with formic acid and other irritants.