Name any two macronutrients required by plants.

Explanation

**Step-by-Step Solution:**

1. **Understanding Macronutrients**: Macronutrients are nutrients that plants require in larger quantities for their growth and development. They play crucial roles in various physiological processes.

2. **Identifying Macronutrients**: Some common macronutrients essential for plants include:
- Carbon (C)
- Nitrogen (N)
- Hydrogen (H)
- Phosphorus (P)
- Potassium (K)
- Calcium (Ca)
- Magnesium (Mg)
- Sulfur (S)

3. **Selecting Two Macronutrients**: From the list of macronutrients, we can choose any two. For this question, we will select:
- Nitrogen (N)
- Magnesium (Mg)

4. **Explaining Their Importance**:
- **Nitrogen**: It is an integral part of amino acids, which are the building blocks of proteins. It is also vital for the synthesis of nucleotides, chlorophyll, and various enzymes. Nitrogen is crucial for plant growth and development.
- **Magnesium**: This nutrient is a key component of chlorophyll, which is essential for photosynthesis. It also acts as an activator for many enzymes and plays a significant role in carbohydrate metabolism.

5. **Conclusion**: Therefore, the two macronutrients required by plants are Nitrogen and Magnesium.

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