Which do not belong to Protista ?

Options

A. Euglenoids
B. Zooflagellates
C. Methanogens/Ascomycetes
D. Ciliates.

Answer

To determine which option does not belong to the kingdom Protista, we will analyze each option provided in the question.

**Step 1: Understand the Kingdom Protista**
- The kingdom Protista consists of unicellular eukaryotes. These organisms have a true nucleus and membrane-bound organelles.

**Step 2: Analyze the Options**
1. **Euglenoids**:
- Euglenoids are unicellular flagellates that belong to the kingdom Protista. A common example is Euglena.
- Conclusion: **Belongs to Protista.**

2. **Zooflagellates**:
- Zooflagellates are also unicellular organisms that possess flagella and are part of the Protista kingdom. They can be parasitic, with examples like Trypanosoma and Plasmodium.
- Conclusion: **Belongs to Protista.**

3. **Methanogens**:
- Methanogens are a type of bacteria that produce methane and belong to the Archaebacteria group. They are prokaryotic and part of the kingdom Monera, not Protista.
- Conclusion: **Does not belong to Protista.**

4. **Ascomycetes**:
- Ascomycetes are a type of fungi characterized by their spore formation in sac-like structures called asci. They belong to the kingdom Fungi, not Protista.
- Conclusion: **Does not belong to Protista.**

5. **Ciliates**:
- Ciliates are unicellular protists that have cilia for movement. A well-known example is Paramecium, which is part of the Protista kingdom.
- Conclusion: **Belongs to Protista.**

**Step 3: Identify the Correct Answer**
- From the analysis, the options that do not belong to the kingdom Protista are **Methanogens** and **Ascomycetes**. However, since the question asks for only one option, the most straightforward answer is **Methanogens** (Option C).

**Final Answer: Methanogens do not belong to Protista.**

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