AP BIOLOGY

Detailed explanation-1: -Root hair is the hair found in the roots of plants. These root hairs absorb water and minerals from the soil because they are in direct contact with the water film between the soil particles. Through the diffusion process, water enters the root hairs.

Detailed explanation-2: -Plants absorb water through their entire surface – roots, stems and leaves. However, the majority of water is absorbed by root hairs. Root hairs are thin-walled uni-cellular outgrowths of epidermis.

Detailed explanation-3: -From the Soil into the Plant Essentially all of the water used by land plants is absorbed from the soil by roots. A root system consists of a complex network of individual roots that vary in age along their length. Roots grow from their tips and initially produce thin and non-woody fine roots.

Detailed explanation-4: -Water enters the plant via the roots. The roots are adapted for this role by having cells with hair-like protrusions (root hair cells) which increases the surface area. Water enters the root by osmosis and moves along through the root cells in the same way until it gets to the xylem vessels.

Detailed explanation-5: -The root’s cells are in direct touch with the soil and actively absorb ions. As a result, the ion concentration inside the root rises, increasing the osmotic pressure and the rate at which water moves from the soil into the root. Due to their thin walls, root hairs allow water to continuously enter the root xylem.