Nitrogen is present in cell walls of

Options

A. Monera
B. Protista
C. Fungi
D. 1 & 3

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which organisms have nitrogen present in their cell walls. We need to analyze the options provided: Monera, Protista, Fungi, and the combined option of Monera and Fungi.

2. **Analyzing Option A - Monera**:
- Monera is a kingdom that includes unicellular prokaryotic organisms, such as bacteria.
- Many bacteria, especially nitrogen-fixing bacteria, have cell walls that contain nitrogen.
- Therefore, nitrogen is present in the cell walls of organisms in the Monera kingdom.

3. **Analyzing Option B - Protista**:
- Protista is a kingdom that includes a diverse group of mostly unicellular eukaryotic organisms.
- The cell walls of protists do not typically contain nitrogen. Instead, they may contain cellulose or silica.
- Thus, nitrogen is not present in the cell walls of Protista.

4. **Analyzing Option C - Fungi**:
- Fungi are a kingdom of organisms that have cell walls made of chitin, which contains nitrogen.
- Therefore, nitrogen is indeed present in the cell walls of fungi.

5. **Analyzing Option D - 1 and 3**:
- This option combines Monera and Fungi, both of which have nitrogen in their cell walls.
- Since both Monera and Fungi contain nitrogen in their cell walls, this option is also correct.

6. **Conclusion**:
- The correct answer is option D (1 and 3), as both Monera and Fungi have nitrogen in their cell walls.

### Final Answer:
The correct answer is **Option D: 1 and 3** (Monera and Fungi).

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