Essential micronutrients are also known as

Options

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

Answer

To solve the question "Essential micronutrients are also known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- Nutrients are classified into two main categories: macronutrients and micronutrients.
- Macronutrients are required by plants in larger quantities, while micronutrients are needed in smaller amounts.

2. **Identify Micronutrients**:
- Essential micronutrients are the nutrients that are crucial for plant growth and development but are required in trace amounts.

3. **Evaluate the Options**:
- Option A: Tracer elements - This term is not commonly used in the context of micronutrients.
- Option B: Trace elements - This term refers to the same group of nutrients as essential micronutrients.
- Option C: Radioisotopes - These are unstable isotopes and not related to essential micronutrients.
- Option D: Framework elements - This term does not apply to micronutrients.

4. **Select the Correct Answer**:
- Since essential micronutrients are required in small amounts, they are also known as trace elements. Therefore, the correct answer is **Option B: Trace elements**.

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

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