Plants require minor elements in small quantities, their major role is to act as

Options

A. regulation of cell division of meristematic sites
B. co-factors of enzymes
C. building blocks of important amino acids
D. precursors of plant hormones

Answer

**Solution:**

Plants require minor elements, also known as micronutrients, in small quantities. These micronutrients play several crucial roles in plant physiology. The major roles of these minor elements include:

1. **Cofactors for Enzymes**: Micronutrients often act as cofactors for various enzymes, which means they are essential for enzyme activity. Enzymes are proteins that catalyze biochemical reactions in the plant, and the presence of these minor elements is necessary for the proper functioning of these enzymes.

2. **Regulation of Cell Division**: Some micronutrients are involved in the regulation of cell division and growth processes. They help in the development and differentiation of plant cells.

3. **Building Blocks of Important Compounds**: Micronutrients serve as building blocks for important amino acids and other organic compounds necessary for plant growth and development.

4. **Precursors of Plant Hormones**: Certain minor elements are precursors in the synthesis of plant hormones, which regulate various physiological processes in plants, including growth, development, and responses to environmental stimuli.

In summary, while plants require these minor elements in small quantities, their roles are significant as they contribute to enzyme function, cell division, and the synthesis of essential compounds and hormones.

---