Whittaker's protista excludes

Options

A. some unicellular algae and fungi
B. no unicellular organisms
C. only unicellular prokaryotes
D. all the above

Answer

### Step-by-Step Solution:

1. **Understanding Whittaker's Classification**: Whittaker proposed a five-kingdom classification system that includes Monera, Protista, Fungi, Plantae, and Animalia. Each kingdom is defined based on specific characteristics of the organisms it contains.

2. **Identifying the Protista Kingdom**: The Protista kingdom consists of unicellular eukaryotic organisms. This includes various types of unicellular algae.

3. **Distinguishing Between Prokaryotes and Eukaryotes**: Prokaryotes are organisms whose cells do not have a defined nucleus (e.g., bacteria), while eukaryotes have a defined nucleus. In Whittaker's classification, prokaryotes are placed in the Monera kingdom.

4. **Analyzing the Options**: The question asks what is excluded from the Protista kingdom.
- Option 1 mentions "some unicellular algae and fungi". Unicellular algae are included in Protista, and fungi belong to a separate kingdom, so this option is incorrect.
- Option 2 states "no unicellular organism". This is incorrect because Protista includes unicellular organisms.
- Option 3 states "only unicellular prokaryotes". Since prokaryotes are not included in Protista and are instead classified under Monera, this option is correct.
- Option 4 is not provided but would also likely be incorrect based on the context.

5. **Conclusion**: The only organisms excluded from the Protista kingdom are unicellular prokaryotes, which are classified under the Monera kingdom. Therefore, the correct answer is option 3.