Copeland and Stanier (1956) in their four kingdom system, placed prokaryotes in kingdom

Options

A. Monera (Mycota)
B. Prototista (Protista)
C. Metaphyta
D. Metazoa

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the classification of prokaryotes according to the four kingdom system proposed by Copeland and Stanier in 1956.

2. **Identifying the Four Kingdoms**: According to Copeland and Stanier, the four kingdoms in their classification system are:
- Monera
- Protista (also known as Prototista)
- Plantae
- Animalia

3. **Defining Prokaryotes**: Prokaryotes are unicellular organisms that lack a nucleus and other membrane-bound organelles. They include bacteria and archaea.

4. **Locating Prokaryotes in the Classification**: In the four kingdom system, prokaryotes were specifically placed in the kingdom Monera. This kingdom encompasses all prokaryotic organisms.

5. **Alternative Name**: It is also noted that Monera is sometimes referred to as Mycota, which is another term used in some classification systems.

6. **Conclusion**: Therefore, the correct answer to the question is that prokaryotes were placed in the kingdom Monera (or Mycota) according to Copeland and Stanier's four kingdom system.

**Final Answer**: Option A: Monera or Mycota.

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