which of the following is excluded in whittaker's five kingdom system of classification

Options

A. Algae
B. Fungi
C. Bacteria
D. Viruses.

Answer

To determine which of the following is excluded in Whittaker's five kingdom system of classification, we need to analyze the options provided: Alga, Fungi, Bacteria, and Viruses.

### Step-by-Step Solution:

1. **Understanding Whittaker's Five Kingdom Classification**:
- Whittaker proposed a classification system that includes five kingdoms:
1. Monera (prokaryotic organisms)
2. Protista (simple eukaryotic organisms)
3. Fungi (fungi kingdom)
4. Plantae (plants)
5. Animalia (animals)

2. **Analyzing the Options**:
- **Alga**: Algae are primarily classified under the kingdom Plantae and some under Protista. Therefore, algae are included in Whittaker's classification.
- **Fungi**: Fungi are explicitly one of the five kingdoms in Whittaker's classification. Thus, fungi are included.
- **Bacteria**: Bacteria fall under the kingdom Monera, which is part of the five kingdoms. Hence, bacteria are included.
- **Viruses**: Viruses are not classified under any of the five kingdoms. They are considered non-living entities outside of a host cell and do not fit into the classification system proposed by Whittaker.

3. **Conclusion**:
- The only option that is excluded from Whittaker's five kingdom classification is **Viruses**.

### Final Answer:
**Viruses** are excluded in Whittaker's five kingdom system of classification.