Question

The cell wall is permeable, this can be best deduced from the passage of water and mineral salts from

• A. Root hairs into cortical cells
• B. Pericyle cells into tracheal elements
• C. Cortical cells into the pericycle
• D. Soil into root hairs

Answer 1

Answer: (D)

Soil into root hairs

Plants absorb water from the soil through the root and transport it to the stem, leaves and flowers. Roots have root hairs that are unicellular, thin-walled outgrowths of the epiblema (skin of the root). The root hairs are in close contact with the thin film of water surrounding the soil particles. There are mineral salts such as nitrates, chlorides, sulphates, phosphates, etc., dissolved in this water. Therefore, the correct answer is option D.