Essential Mineral Elements

The characteristic of an essential element is that it

Identify the elements whose deficiency causes both necrosis and chlorosis.

Consider the following statements i, ii and iii regarding criteria for essentiality of the nutrients in plants: i. The presence of elements is must for plants to complete their life cycle. ii. The role of the element can be replaced by another element. iii. The element must be directly involved in the metabolism of the plant. Choose the correct statement/s :