What are essential elements?

What is an essential element ?

Explain with examples: macronutrients, micronutrients, beneficial nutrients, toxic elements and essential elements.

Mention: Criteria for essential elements in plant mineral nutrition.

Mention the essential elements required for genetic engineering.

Which one of the following roles is not characteristic of an essential element?

Which one of the following statements can best explain the term critical concentration of an essential element?

Describe about the types of essential elements.

Out of the following which is an essential element of a communication system?

Name an essential element absorbed by plant from air.

The essential elements are directly involved in the metabolism of the plant.