What is the major function of phytohormones?

Explanation

**Step-by-Step Solution:**

1. **Definition of Phytohormones**: Phytohormones, also known as plant hormones, are chemical substances produced in plants that regulate various physiological processes.

2. **Major Function**: The primary function of phytohormones is to control plant growth and development. They play a crucial role in coordinating various growth responses in plants.

3. **Examples of Phytohormones**:
- **Cytokinins**: These hormones are primarily involved in promoting cell division (cytokinesis) and are found in higher concentrations in fruits and seeds. They help in the growth and development of the plant by stimulating the growth of shoots and delaying leaf senescence.
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