Question

Root endodermis has the ability to actively transport ions in only one direction :

Answer 1

Root endodermis because of the layer of suberin has the ability of actively transporting ions in one direction only. Root endodermis is able to actively transport ions in one direaction only because of the layer of suberin. Transport proteins of endodermal cells are control point where a plant adjusts the quantity and types of solutes that reach the xylem.