Which is essential for the growth of the root tip?

Step-by-step solution

Source: It is absorbed by the plants in the form of Ca2+ from calcium carbonate etc. Functions: (i) It is necessary for the formation of the middle lamella of plants where it occurs as calcium pectate. (ii) It is necessary for the growth of apical meristem and root hair and tip formation. (iii) It acts as an activator of several enzymes, e.g., ATPase, succinic dehydrogenase, adenylate kinase, etc. (iv) Along with Na+ and K+, it maintains the permeability of the plasma membrane. (v) It is involved in the organizatio