Which kingdom was introduced in four kingdom classification and who proposed it ?

Options

A. Protista and Copeland
B. Plantae and Linnaeus
C. Monera and Whittaker
D. Monera and Copeland

Answer

To answer the question regarding which kingdom was introduced in the four kingdom classification and who proposed it, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Classification Systems**:
- Familiarize yourself with the different biological classification systems. The two main systems to consider are the two kingdom classification by Linnaeus and the three kingdom classification by Ernst Haeckel.

2. **Identify the Three Kingdoms**:
- In the three kingdom classification proposed by Ernst Haeckel, the kingdoms included are:
- Kingdom Animalia
- Kingdom Plantae
- Kingdom Protista

3. **Introduction of the Fourth Kingdom**:
- In the four kingdom classification, an additional kingdom was introduced to include organisms that did not fit into the existing categories. This kingdom is known as **Monera**.

4. **Proposer of the Four Kingdom Classification**:
- The four kingdom classification was proposed by **Copeland** in the year **1965**.

5. **Summary of the Four Kingdoms**:
- The four kingdoms in this classification are:
- Kingdom Monera (prokaryotic organisms)
- Kingdom Protista (eukaryotic microorganisms)
- Kingdom Plantae (plants)
- Kingdom Animalia (animals)

### Final Answer:
The kingdom introduced in the four kingdom classification is **Monera**, and it was proposed by **Copeland** in **1965**.