Question

Choose the correct answer from the alternatives given.
By what method arc ions absorbed by plants?

• A. Along DPD gradient
• B. By molecular diffusion
• C. By carriers and pumps
• D. Along water potential gradients

Answer 1

The correct option is C By carriers and pumps

For plants to take up mineral ions, ions are moved into root hairs, where they are in a higher concentration than in the dilute solutions in the soil. Active transport (pumps) then occurs across the root so that the plant takes in the ions it needs from the soil around it. The root hair cells have carrier molecules on their surface that pick up the minerals and move them into the cell against the concentration gradient.

So, the correct option is, 'By carriers and pumps'.