Which one is correct statement with reference to Ascaris lumbricoides

Options

A. Monogenetic , dimorphic ,pseudocoelomate and coelozoic parasite
B. Monogenetic , dimorphic, coelomate and histozoic parasite
C. Digenetic , dimorphic, pseudocoelmate and histozoic
D. Digmorphic , coelomate and histozoic parasite .

Answer

### Step-by-Step Solution:

1. **Understanding Ascaris lumbricoides**:
Ascaris lumbricoides is a parasitic roundworm that primarily infects humans. It is known for causing ascariasis, a common intestinal infection.

2. **Identifying the Type of Parasite**:
- Ascaris lumbricoides is classified as a **monogenetic parasite** because it requires only one host (humans) to complete its life cycle.

3. **Sexual Dimorphism**:
- The species exhibits **sexual dimorphism**, meaning the male and female Ascaris have distinct characteristics beyond just their reproductive organs. For example, males are typically smaller than females and have a curved tail.

4. **Coelom Classification**:
- Ascaris lumbricoides is classified as a **pseudocoelomate**. This means it has a body cavity (pseudocoel) that is not completely lined by mesodermal tissue. The pseudocoel is a fluid-filled space that helps in the distribution of nutrients and waste.

5. **Type of Parasite**:
- Ascaris lumbricoides is also classified as a **coelzoic parasite**, which means it lives within the cavities of the host body, specifically in the intestinal lumen of humans.

6. **Conclusion**:
- Based on the characteristics discussed, the correct statement regarding Ascaris lumbricoides is that it is a **monogenetic, dimorphic, pseudocoelomate, and coelzoic parasite**. Therefore, the correct option is the first one.

### Final Answer:
The correct statement with reference to Ascaris lumbricoides is: **"monogenetic, dimorphic, pseudocoelomate, and coelzoic parasite."**

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