Essential micronutrients are also known as

Options

A. tracer elements
B. trace elements
C. radioisotopes
D. frame work elements

Answer

**Step-by-Step Solution:**

1. **Understanding Essential Micronutrients:**
- Essential micronutrients are nutrients required by plants in very small amounts. They play a crucial role in various physiological functions and are vital for plant growth and development.

2. **Identifying the Alternative Name:**
- Essential micronutrients are also referred to by another name, which is "trace elements." This term emphasizes their requirement in trace (small) quantities.

3. **Analyzing the Options:**
- Option A: Tracer element - This is a misnomer and not commonly used in the context of micronutrients.
- Option B: Tracer element - This is the same as option A and is incorrect.
- Option C: Radioisotopes - These are unstable isotopes that emit radiation and are not related to micronutrients.
- Option D: Framework element - These are major elements that form the structure of cells (like carbon, hydrogen, and oxygen) and are not classified as micronutrients.

4. **Conclusion:**
- Based on the definitions and explanations, the correct answer is that essential micronutrients are also known as "trace elements."

**Final Answer:**
Essential micronutrients are also known as trace elements.

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