Question
7. Root hair cells are adapted to absorb water and mineral ions by A. having chloroplasts. B. being transparent. C. having thick cell walls. D. having a large surface area.
Answer
4.4
(349 Votes)
Holly
Professional · Tutor for 6 years
Answer
D
Explanation
Root hair cells are specialized for taking up water and mineral ions from the soil. They are located on the surface of the plant root, thereby placing them in close contact with the soil. The main features that aid this function include:Option A: Chloroplasts are helpful in photosynthesis but are not necessary for nutrient absorption in root hair cells.Option B: Transparency of a cell does not enhance absorption. Option C: Thick cell walls might even hinder the absorption of ions due to increased diffusion distance. Option D: Root hair cells increase surface area to enhance nutrient and water absorption rates. Hence, having a large surface area enhances the absorption of minerals and water in root hair cells.