AP BIOLOGY

Detailed explanation-1: -The cell wall of root hair is thin and freely permeable. It allows movement of water molecules and dissolved substances freely in and out of the cell.

Detailed explanation-2: -The root hair cell has a large surface area to provide contact with soil water. It has thin walls so as not to restrict the movement of water.

Detailed explanation-3: -The movement of water is due to the difference in the osmotic pressure. The osmotic pressure of water in roots is high and so the water enters the root hair cells. The water is transported to the other cells in the root region by osmosis.

Detailed explanation-4: -Root hair cells are adapted for taking up water and mineral ions by having a large surface area to increase the rate of absorption. They also contain lots of mitochondria, which release energy from glucose during respiration in order to provide the energy needed for active transport.

Detailed explanation-5: -Root hairs are thin walled, slender extension of Parenchyma cells. Root hairs are thin-walled slender extensions of root epidermal cells that are present in millions of number at the root. Root hairs are thin-walled slender extensions of root epidermal cells that are present in millions of number at the root.