The deficiency of .................... causes the death of the stem and root apices.

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Question:** The question asks about the deficiency that causes the death of stem and root apices.

2. **Understand the Role of Nutrients:** Recognize that plants require various nutrients for growth and development, and deficiencies in these nutrients can lead to specific symptoms or issues.

3. **Focus on Calcium:** In this context, the nutrient in question is Calcium. It is classified as a macronutrient, meaning it is needed in larger quantities by plants.

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