AIIMS 2019 Botany Micronutrients MCQ Question

Microelements, also known as trace elements, are required by organisms in minute quantities for various biochemical processes. Among the given options, manganese (Mn) is classified as a microelement because it is essential for enzyme function and is needed in very small amounts compared to macronutrients. In contrast, calcium (Ca), magnesium (Mg), and sulfur (S) are considered macronutrients, as they are required in larger quantities for structural and metabolic functions in living organisms. Understanding the distinction between microelements and macronutrients is crucial for grasping the nutritional needs of plants and animals.