Question

There are about ____ elements that are essential for the growth of plants.

• A. 10
• B. 20
• C. 40
• D. 80

Answer 1

The correct option is B

20

There are about 20 elements that are required for the proper growth of plants. These are known as essential elements. Carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium and sulphur are some of these essential elements. These are naturally available in the soil through the decomposition of dead plants and animals by microorganisms.