Protista differs from Monera in having

Options

A. cell wall
B. autotrophic nutrition
C. flagella
D. nuclear membrane

Explanation

To solve the question "Protista differs from Monera in having," we need to analyze the characteristics of both groups and identify the main difference.

### Step-by-Step Solution:

1. **Understand the Groups**:
- **Protista**: This kingdom consists of unicellular eukaryotic organisms. Eukaryotes have a defined nucleus and membrane-bound organelles.
- **Monera**: This kingdom includes prokaryotic organisms, which lack a defined nucleus and membrane-bound organelles. Monera includes bacteria and archaea.

2. **Analyze the Options**:
- **Cell Wall**: Both Protista and Monera can have cell walls. Some protists have cell walls made of cellulose, while most bacteria have cell walls made of peptidoglycan. Therefore, this is not a distinguishing feature.
- **Autotropic Nutrition**: Some protists (like algae) are autotrophic, and some Monera (like cyanobacteria) are also autotrophic. Thus, this is not a distinguishing feature either.
- **Flagella**: Both Protista and Monera can possess flagella for movement. Hence, this is not a distinguishing feature.
- **Nuclear Membrane**: Protista, being eukaryotic, have a nuclear membrane, while Monera, being prokaryotic, do not have a nuclear membrane.

3. **Conclusion**:
- The key difference between Protista and Monera is the presence of a nuclear membrane in Protista and its absence in Monera. Thus, the correct answer is that Protista differs from Monera in having a **nuclear membrane**.

### Final Answer:
**Protista differs from Monera in having a nuclear membrane.**