Protistan protozoan having nuclear dimorphism is

Options

A. Amoeba proteus
B. Paramaecium caudatum
C. Plasmodium vivax
D. Trypanosoma gambiense.

Answer

To solve the question "Protistan protozoan having nuclear dimorphism is," we will follow these steps:

### Step 1: Understand the concept of nuclear dimorphism.
Nuclear dimorphism refers to the presence of two different types of nuclei within a single cell. This phenomenon is significant in certain protists, particularly in some protozoans.

### Step 2: Identify the types of nuclei involved.
In organisms exhibiting nuclear dimorphism, there are typically two types of nuclei:
- **Micronucleus**: This is the smaller nucleus, which is involved in reproductive processes.
- **Macronucleus**: This is the larger nucleus, which regulates and controls metabolic functions.

### Step 3: Analyze the options provided.
1. **Amoeba proteus**: This organism does not exhibit nuclear dimorphism.
2. **Paramecium caudatum**: This organism is known to have nuclear dimorphism, possessing both a micronucleus and a macronucleus.
3. **Plasmodium vivax**: This organism does not exhibit nuclear dimorphism.
4. **Trypanosoma gambiense**: This organism also does not exhibit nuclear dimorphism.

### Step 4: Determine the correct answer.
Based on the analysis, the only organism from the options that exhibits nuclear dimorphism is **Paramecium caudatum**.

### Conclusion:
The correct answer to the question is **Paramecium caudatum**.

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