Question

What are root hairs? Mention their function.

Answer 1

Root hairs are single celled protuberances of some cells in the outermost layer of the root, which absorb water and minerals from the soil.

Solution -

1. Root hairs are single celled protuberances of some cells in the outermost layer of the root.
2. The root hair cells are covered with a thin cell wall that allows the movement of water molecules through it but prevents the movement of large molecules of other substances. Such a type of membrane is called a semipermeable membrane.
3. The root hairs absorb water and minerals from the soil.
4. The root hairs, being in close proximity to the water in the soil, help in increasing the surface area for absorption of water.