The most wide spread group of microorganisms on earth belong to kingdom

Options

A. Monera
B. Protista
C. Fungi
D. Plantae

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the most widespread group of microorganisms on Earth and which kingdom they belong to.

2. **Referring to Classification Systems**: We need to refer to R.H. Whittaker's 5 Kingdom Classification System to identify the kingdoms of living organisms.

3. **Identifying the Kingdoms**: According to Whittaker's classification, the five kingdoms are:
- Monera
- Protista
- Fungi
- Plantae
- Animalia

4. **Focusing on Monera**: The kingdom Monera is known for including prokaryotic organisms, which are unicellular and lack a well-defined nucleus and organelles. This kingdom includes bacteria, archaeobacteria, and cyanobacteria.

5. **Determining the Most Widespread Group**: Among these kingdoms, Monera is recognized as the most widespread group of microorganisms on Earth. This is due to the vast diversity and adaptability of bacteria found in various environments.

6. **Conclusion**: Therefore, the answer to the question is that the most widespread group of microorganisms on Earth belongs to the kingdom **Monera**.

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