Question

what is the mechanism by which minerals are absorbed by the roots?​

Answer 1

Answer:

There are three main mechanisms of mineral absorption: (I) Ion exchange – In this method the ions adsorbed on the surface of the root can exchange with the ions of the same charge from the soil solution. For example – Hydrogen ions adsorbed on the surface of root cells can be exchanged with potassium ions in the soil.

Answer 2

Answer:

When the concentration of mineral salts is higher in the outer solution than in the cell sap of the root cells, the mineral salts are absorbed according to the concentration gradient by simple process of diffusion. This is called as passive absorption because it does not require expenditure of metabolic energy...