Which of the following kindoms has no well defined boundaries?

Options

A. Monera
B. Protista
C. Fungi
D. Metaphyta and Metazoa

Answer

To solve the question "Which of the following kingdoms has no well-defined boundaries?" we will analyze each of the given options based on the characteristics of the kingdoms.

### Step-by-Step Solution:

1. **Understanding the Kingdoms**: The question provides four options: Monera, Fungi, Protista, and Metaphyta/Metazoa. We need to determine which of these kingdoms lacks well-defined boundaries.

2. **Analyzing Monera**:
- Monera includes prokaryotic organisms, such as bacteria.
- These organisms have a cell wall made of peptidoglycan, which gives them a defined structure.
- Therefore, Monera has well-defined boundaries.

3. **Analyzing Fungi**:
- Fungi are eukaryotic organisms characterized by a cell wall made of chitin.
- This structure also provides a defined boundary to the organisms within this kingdom.
- Thus, Fungi also has well-defined boundaries.

4. **Analyzing Protista**:
- Protista is a diverse kingdom that includes a variety of organisms, such as algae and protozoa.
- The organisms in this kingdom do not have a single defining characteristic, leading to a lack of well-defined boundaries.
- Therefore, Protista is the kingdom that does not have well-defined boundaries.

5. **Analyzing Metaphyta and Metazoa**:
- Metaphyta (plants) and Metazoa (animals) are well-defined kingdoms with clear structural characteristics.
- Both have distinct boundaries due to their cellular organization and specialized structures.

6. **Conclusion**:
- After analyzing all the options, we find that the correct answer is **C. Protista**, as it is the only kingdom that lacks well-defined boundaries.

### Final Answer:
The kingdom that has no well-defined boundaries is **C. Protista**.