Which of the following mineral deficiencies will cause death of stem and root tips ?

Options

A. Mo
B. Ca
C. S
D. Fe

Answer

To solve the question regarding which mineral deficiency causes the death of stem and root tips, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Importance of Minerals in Plants**:
- Plants require various minerals for their growth and development. These minerals play crucial roles in physiological processes and structural integrity.

2. **Analyzing the Options**:
- The question provides several mineral options. We need to analyze each one to determine its role in plant health, particularly regarding stem and root tips.

3. **Option 1: Molybdenum**:
- Molybdenum is essential for nitrogen metabolism in plants. Its deficiency typically leads to yellowing of leaves (chlorosis) but does not directly cause the death of stem and root tips.

4. **Option 2: Calcium**:
- Calcium is vital for the structural integrity of plant cells. It is crucial for the formation of the middle lamella, which helps in cell adhesion. A deficiency in calcium can lead to stunted growth, distorted leaves, and importantly, the death of stem and root tips.

5. **Option 3: Sulfur**:
- Sulfur is important for the synthesis of amino acids and proteins. Its deficiency can cause chlorosis and wilting of leaves but does not typically result in the death of stem and root tips.

6. **Option 4: Iron**:
- Iron is essential for chlorophyll synthesis and is involved in various enzymatic processes. A deficiency leads to yellowing of leaves (interveinal chlorosis) but does not directly affect the stem and root tips to the extent of causing their death.

7. **Conclusion**:
- Based on the analysis, the mineral deficiency that causes the death of stem and root tips is **Calcium**.

### Final Answer:
**Calcium deficiency causes the death of stem and root tips.**

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