Question

The root hairs are always unicellular and unbranched in the plant kingdom except ..................... roots where they are multicellular.

• A. Root hairs of Nymphaea
• B. Root hairs of Cucurbita
• C. Root hair of Hevea
• D. Aerial adventitious roots of Kalanchoe
• E. None of the above

Answer 1

The correct option is D Aerial adventitious roots of Kalanchoe

The root hairs of plants are actually tubular outgrowth of trichoblast, a hair-forming cell present on the epidermis of roots. These help the plants to increase the surface area of their roots so as to absorb the mineral nutrients present in the soil. In most dicotyledons and monocots, the root hairs are unicellular, thin walled and un-branched structures and are short lived. However, there are exceptions such as the ones found in the aerial adventitious roots of Kalanchoe where these are multicellular.