Which is essential for the growth of root tip?

Options

A. (a) Zn
B. (b) Fe
C. (c) Ca
D. (d) Mn

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which element is essential for the growth of the root tip.

2. **Reviewing the Options**: The options provided are zinc, iron, calcium, and manganese. We need to analyze each option to determine its role in root tip growth.

3. **Analyzing Zinc**:
- Zinc is primarily involved in the synthesis of chlorophyll and plays a role in photosynthesis.
- Since photosynthesis is not directly related to root growth, zinc is not essential for the growth of the root tip.

4. **Analyzing Iron**:
- Iron is also associated with photosynthesis and is crucial for the formation of chlorophyll.
- Similar to zinc, iron does not directly contribute to root tip growth, making it an incorrect option.

5. **Analyzing Calcium**:
- Calcium is vital for the synthesis of new cell walls, particularly in the form of calcium pectate.
- It provides structural strength and is essential for cell division and elongation, which are critical for root growth. Therefore, calcium is essential for the growth of the root tip.

6. **Analyzing Manganese**:
- Manganese is involved in the photolysis of water during photosynthesis.
- Like zinc and iron, it does not play a direct role in root tip growth, making it another incorrect option.

7. **Conclusion**: Based on the analysis, the element that is essential for the growth of the root tip is calcium.

**Final Answer**: Calcium is essential for the growth of the root tip.

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