AP BIOLOGY

Detailed explanation-1: -The presence of trichome hairs on the surface of xerophytic plants is an adaptation so as to survive in xeric habitats. Trichomes help in the reduction of the rate of transpiration and limit water loss.

Detailed explanation-2: -A major function of the trichome is thought to be in plant defense against insects. Chemicals produced in the glandular tip can deter feeding or the trichome can physically prevent the insect from reaching and feeding on the leaf.

Detailed explanation-3: -Trichomes can be divided into stinging hairs, glandular hairs, and peltate hairs based on their modification. The functions of trichomes include preventing water loss from the cells and adjusting plant cells in sudden changes in the environment.

Detailed explanation-4: -Trichomes play an important role in plant growth and development by protecting them from UV light, insect predation, and excess transpiration. The phytochemicals secreted by GSTs provide protection against pathogens and pests, and also attract pollinators (Wagner, 1991; Wagner et al., 2004; Schilmiller et al., 2008).

Detailed explanation-5: -Trichomes can be insulating by keeping frost away from leaf cells. They can help reduce evaporation by protecting the plant from wind and heat. In many cases, trichomes protect plants from herbivorous insects that may want to feed on them.