(i) Glandular hairs present on stems and leaves reduce plant sensation and light intensity.
(ii) Glandular hairs protect the plant from insect attack.
(iii) The hairs of the pistil of the flower help in the pollination of the plant by receiving the pollen.
(iv) Hair present on fruit and seed skin helps in spreading.
(v) Glandular rhombs of insectivorous plants secrete enzymes which aid in digestion of insect bodies.
(vi) Plants absorb water and mineral salts from soil by rhizomes.
(vii) Stem hairs protect the plant from external injury by secreting glue, mucilage and toxins.