Entities excluded from five kingdom classification of Whittaker are

Options

A. Viruses
B. Moulds
C. Algal fungi
D. Fungi Imperfecti.

Answer

**Step-by-Step Solution:**

1. **Understanding the Five Kingdom Classification**: The five kingdom classification system proposed by Robert Whittaker categorizes living organisms into five distinct kingdoms: Monera (bacteria), Protista (algae), Fungi, Plantae, and Animalia.

2. **Identifying Excluded Entities**: The question asks for entities that are not included in this classification. Notably, certain organisms do not fit neatly into these kingdoms.

3. **Listing Excluded Entities**: According to the video transcript, the entities excluded from the five kingdom classification include:
- Viruses
- Viroids
- Lichens
- Molds
- Algal fungi
- Fungi imperfecti

4. **Focusing on Viruses**: Among these, viruses are the most significant exclusion as they are acellular and do not exhibit characteristics of living organisms, such as cellular structure and metabolism.

5. **Conclusion**: Therefore, the primary entity excluded from the five kingdom classification of Whittaker is viruses.

**Final Answer**: Viruses.

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